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Grey Granite gives projects a calm, balanced base that withstands heavy traffic and weather when details are correct. It is an igneous stone made of quartz and feldspars, with fine dark minerals that create a tidy salt-and-pepper look. Low porosity and high strength support long service life in floors, façades, steps, and countertops. The surface accepts polished, honed, leathered, flamed, and bush-hammered finishes, so teams can tune light levels and slip resistance to the setting. The sections below explain what the stone is, how it behaves, which formats exist, where it is used, what formats cost, and how to install and maintain it.
When deadlines are tight, predictable supply and clear documentation matter as much as color. JAM Stone Co. coordinates block selection, calibrated thickness, and shade grouping, then plans packing and sailings to meet project windows. Batch photos and dimensional checks travel with each lot for straightforward receiving. As a trusted supplier of Grey Granite, the company supports standard modules and custom cut-to-size, communicating capacities and split shipments early. This steady process lowers site risk, shortens handover lists, and helps teams deliver neat, durable work under real-world constraints.
Grey Granite is a silica-rich rock formed from slowly cooled magma. Typical mineral content includes about 20–40% quartz, roughly 50–70% feldspars, and small amounts of biotite or hornblende. This mix yields the familiar grey field with black and white specks. The stone does not transmit light and holds its tone outdoors. Natural strength and low water uptake support long service life when joints, movement gaps, and drainage are designed well. Grain size varies by source, so the visual read can be very uniform or gently mottled while staying within a neutral palette.
Physical & Structural Characteristics of Grey Granite
Granite pairs high mass with tight pores, so it resists impact and wear in busy interiors and exterior plazas. Dense structure limits staining when a good penetrating sealer is applied and renewed on schedule. In fabrication, smart calibration keeps thickness steady and reduces lippage during installation. Coarser grains show bolder peppering and may chip more at sharp corners, while finer grains finish to higher gloss and cleaner arrises. For façades and stair elements, correct thickness and anchoring are essential. With proper selection, most grey granites show minimal open defects, and standard shop processes stabilize tight micro-cracks.
A quartz–feldspar framework with minor micas gives granite its strength and chemical stability. Quartz typically ranges from 20–40%, while feldspars make up roughly 50–70%. Accessory oxides can slightly cool or warm the base tone. Low natural porosity limits deep staining when sealing and cleaning are consistent.
Hues run from pale silver to mid charcoal, with speckling rather than veining. Feldspar laths and dark mica create the peppered character. Fine grains read calmer and more uniform; coarse grains appear busier. Some benches display gentle flow textures that reward mindful layout and orientation when installing large floors or long wall runs.
Bulk density commonly ranges ~2,630–2,750 kg/m³. Open porosity is about ~0.2–1.5%, with water absorption near ~0.1–0.6% by weight. Such values suit wet zones when drainage, slope, joints, and sealing are managed well and inspected periodically throughout service life.
Mohs hardness ~6–7 resists many scratches from routine use. Compressive strength often falls between ~130–220 MPa, with flexural strength near ~10–25 MPa depending on cut and thickness. Such capacity allows pavers, treads, and anchored cladding when engineering and fixings are specified correctly.
Proper calibration limits thickness variance and helps edges stay true. Eased arrises around 1–2 mm reduce corner spalls, especially on coarse grains. On façades, allow for thermal movement with joint planning. Shop straight-edge checks and raking-light inspections control flatness and surface quality before packing to avoid rework at the job site.
Grey Granite supports many palettes without dominating the scene. Polished finishes return clear reflections for feature areas; honed surfaces give a soft, low-glare look for busy floors. Flamed and bush-hammered textures increase grip where water is present, while leathered keeps tactile interest with moderate cleaning effort. Color holds outdoors because minerals are UV stable and weather resistant. Chemically, the stone withstands dilute household acids better than marbles and limestones, yet it still benefits from a penetrating sealer to slow oil and dye uptake and to simplify routine maintenance.
Polished granite achieves high gloss and shows crisp grain detail. Honed reduces glare while keeping a refined read in large interiors. Textured finishes scatter light and mute reflections across halls and terraces. Neutral greys pair naturally with glass, wood, and steel, allowing color accents, fabrics, and lighting to lead the composition without visual conflict.
Polished is smooth to the touch and easy to wipe. Honed feels silk-matte with gentle drag underfoot. Leathered preserves micro-topography for grip without harshness. Flamed and bush-hammered raise tooth, improving wet-area safety. Always pair texture with correct slope, drainage, and a cleaning plan matched to local dust, rainfall, and tracked grit.
Balanced mineralogy limits outdoor color shift in sunlight. The stone tolerates freeze–thaw cycles when bedding, drainage, and jointing are correct. Respect thermal expansion with planned joints to protect edges and anchors through seasonal swings. On dark greys, specify UV-stable adhesives and backings to avoid print-through on thin panels in strong sun.
Silicate minerals resist vinegar-level acids better than calcitic stones, but avoid hydrofluoric (HF) acid cleaners, which attack quartz and feldspar. Use pH-neutral agents for routine care. Penetrating sealers reduce oil soak and help buy time for stain removal. Always test removers on off-cuts before full use to confirm compatibility and results.
Supply covers blocks, slabs, tiles, cut-to-size parts, pavers, and accessories such as skirting. Standard slab thickness is 20 or 30 mm, with modules for both residential and commercial work. Finishes include polished, honed, leathered, flamed, and bush-hammered, chosen by light level, slip need, and cleaning regime. Large formats require careful handling and crate design due to weight. For complex items, CNC and waterjet support special edges, curves, and cut-outs that align with shop drawings and site tolerances. Stock lists may include full-body thresholds, windowsills, and corner pieces to simplify coordination at installation.
Commonly produced in 20 and 30 mm with net sizes around 260–320 × 140–200 cm. Fine grains take high polish; coarser grains favor textures. Mark orientation when benches show gentle flow so adjacent pieces read coherently across long counters, corridors, and large wall fields.
Typical modules include 300×300, 600×300, 600×600, and 800×800 mm. Thickness ranges from 10–20 mm depending on substrate and traffic. Use tighter modules for heavy footfall or where many penetrations are expected around fixtures, drains, or floor sockets.
Stair treads, risers, jambs, sills, counters, and coping are fabricated to drawings. Treads are often 30 mm with a small nosing; risers about 20 mm. Provide detailed edge profiles, radii, and tolerances so shop teams match site dimensions reliably, avoiding last-minute grinding or re-drilling during installation and handover.
Mesh-backed sheets in 10×10, 25×25, or 50×50 mm handle slopes and drains well. Honed or textured faces reduce slip and simplify cleaning in showers and pool surrounds. Seal after grouting for best stain control, and verify sheet alignment so joints track cleanly with adjacent field tiles.
Usually 30–60 mm thick in flamed or bush-hammered finish for grip. Specify drainage slope and a bedding system that resists pumping and movement from wheeled loads. Include perimeter restraints, edge chamfers, and jointing suited to freeze–thaw or high heat, depending on the project climate and expected maintenance cycle.
Heights around 80–120 mm at 15–20 mm thickness protect edges and align joints with floor modules. Choose eased or chamfered tops to limit damage during routine cleaning. Pre-prime backs when required and confirm color match against the selected field tiles before mass production begins.
Grey Granite suits interior floors and walls, staircases, lift lobbies, vanities, and countertops. Outdoors, it performs in cladding systems, plazas, pool surrounds, steps, street furniture, and landscape edging. Finish choice should track use: polished for feature interiors with controlled traffic, honed or leathered for busy zones, and flamed or bush-hammered for exterior wet areas. For façades, use anchored systems with movement joints and verify panel thickness through engineering. For paving, specify texture, design for drainage and slope, and choose maintenance methods suited to local dust, rain, or de-icing routines.
Total cost depends on block grade, slab yield, finish, dimensions, production quality, and shipping. Larger blocks deliver wider slabs with fewer defects, reducing waste. Finishes matter as well: polished lines often run faster than deep textures, while leathering adds passes after honing. Thicker parts, jumbo panels, and crate engineering increase material and handling time. Landed cost reflects distance to port, crate design, and shipping schedules. Tight tolerances, clear shade grouping, and accurate take-offs reduce site waste and improve lifecycle value even when unit prices differ.
Uniform tone, tight grain, and a low defect rate improve yield and reduce sorting. Premium grades limit pits and shadow lines, leading to faster installation and fewer site rejections. Clear grading at the quarry and plant streamlines packing, reduces extras, and stabilizes appearance between initial deliveries and later top-up orders.
Blocks which are larger produce broad slabs with high net area per block. Irregular shapes demand more trimming and can raise unit costs despite similar quarry prices. Sound geometry also improves nesting for cut-to-size pieces, increasing recovery and lowering hidden waste during optimization at the saw and bridge cutter.
Calibration, flatness control, and edge integrity save time during fixing and reduce callbacks. Even polishing or texturing keeps appearance consistent between batches. Early mock-ups confirm gloss, tooth, and slip behavior, allowing informed approvals that prevent surprises later, when schedule flexibility is limited and installation teams are already mobilized.
Polished may be less costly per square meter than aggressive textures that wear tools and slow throughput. Bush-hammered or combined textures add steps and handling. Leathered follows honing and requires careful passes. Choose finish to match use, maintenance capacity, and lighting so value is preserved without compromising safety or aesthetics.
30-mm slabs, thick pavers, or jumbo pieces use more material and require slower handling and stronger crates, which influences lead time and freight. Thin large-format tiles demand tighter QA to control warpage. Accurate shop drawings and nesting plans keep yields high and avoid surprise remakes that disrupt shipping windows.
Distance to port, crate format, fumigation rules, and shipping lane cycles shift ETAs and landed costs, especially on long sea routes. Early coordination on cut lists and finish splits helps reserve capacity. Transparent schedules and split shipments reduce risk for phased sites, improving cash flow and installation continuity.
Extraction begins with precision drilling and diamond-wire cutting to release blocks with minimal shock. Teams trim weathered edges and check soundness before loading. At the plant, multi-wire saws convert blocks into slabs at 20 or 30 mm. Calibration sets thickness, then polishing or texturing follows the finish plan. Cut-to-size parts use bridge saws, waterjet, or CNC, with checks for dimensions and squareness against drawings. Sealers are applied where specified to control early staining and streamline installation on fast-track projects. Edge repairs and resin touch-ups are limited to accepted practices and fully disclosed.
Quality control tracks each stage. Slabs are shade-grouped, flatness is checked under raking light, and edges are inspected for chips. Packing uses foam sheets, corner guards, straps, and moisture barriers on galvanized A-frames for slabs, while small parts go into braced wooden crates. Labels record product code, finish, sizes, thickness, and batch. For long sailings, desiccants protect surfaces, and photo logs document each lot prior to container loading for transparent receiving on site. This transparency shortens receiving time and reduces disputes about shade, flatness, or hidden defects.
Use a suitable polymer-modified cement adhesive for most tiles and epoxy only where chemicals or movement demand it. Back-butter large formats to improve coverage. Interior grout is typically 2–4 mm; exterior joints are 3–6 mm with planned movement gaps. After installation, apply a penetrating sealer and renew it based on traffic and exposure. Clean with pH-neutral products and microfiber tools, and avoid waxy coatings that trap dirt and alter slip behavior. Use soft pads on maintenance machines and confirm pad–finish compatibility before routine cycles begin.
Design drainage for all exterior work and set slopes so water does not stand. In kitchens and entries, keep a stain kit ready, act quickly, and test removers on off-cuts before full use. Protect tops with cutting boards and trivets, even though granite resists heat and scratches. In public floors, install entrance mats to capture grit and extend gloss life. Inspect joints, sealant lines, and movement gaps regularly to prevent small issues from becoming costly repairs. Where sand or de-icing salts are common, increase cleaning frequency and review sealer schedules seasonally. Moreover, you can find out about common pitfalls to to avoid in the following:
Inadequate substrate flatness causes lippage and weak adhesion, especially with large formats. Survey and correct levels before fixing, and confirm coverage with periodic lift-and-check. Combine self-leveling where needed with back-buttering so the assembly cures monolithic, resists point loading, and keeps edges aligned across long lines of sight.
Missing or undersized movement joints can lead to tenting, edge damage, and cracked grout. Follow standards for spacing and width, evaluate sun exposure and heat sources, and honor structural joints. Use compatible sealants, protect edges, and document joint locations on drawings so installers do not improvise under time pressure.
Poor drainage allows freeze–thaw distress, salt cycling, and efflorescence. Design positive slope, continuous outlets, and robust bedding systems. Specify textured finishes for wet zones, control joint patterns to manage water, and schedule routine cleaning that removes de-icing residues or windblown dust before it binds to the micro-texture permanently.
Skipping test patches for sealers or stain removers risks color change, residue, or reduced slip resistance. Always trial products on off-cuts from the same batch, confirm dwell times, and document approved methods. Train maintenance teams and limit chemical variety so routines stay predictable and communication remains clear across shifts.
JAM Stone Co. manages Grey Granite from block selection to finished supply with steady, documented quality. Blocks are chosen for uniform tone and sound structure, and slabs run through calibrated lines for consistent thickness, flatness, and finish. Shade maps, batch photos, and dimensional checks support clean installation. CNC and waterjet capability enables complex cut-to-size that matches drawings. As a dependable provider of Grey Granite, JAM Stone Co. aligns production with recognized practices to support reliable windows and predictable outcomes. Production capacity scales from small boutique orders to phased public works while preserving batch continuity.
Reliable delivery depends on verifiable controls at each step. JAM Stone Co. performs visual grading, thickness verification, and edge checks before packing, then plans crate engineering and sailings to align with milestones. Mock-ups and finish samples confirm look and slip behavior early. Documented communication on capacities, split shipments, and lead times supports clear decisions. Operating as a seasoned supplier of Grey Granite, the company integrates export paperwork and schedules for smooth customs clearance and timely receipt. Clear passports, packing lists, and crate maps help receivers stage material quickly and start installation promptly.
Sourcing begins at established reserves in Iran’s hard-stone regions, where JAM Stone Co. maintains close partnerships with mine holders. This connection secures steady benches with consistent grain and tone, improving yield and reducing shade variation between lots. Blocks are graded at the source for integrity, then coded for traceability from bench to slab. Backed by organized sailings and documentation, the company functions as a reliable exporter of Grey Granite, supporting continuity across phased projects and future top-ups. Close bench monitoring also enables early notice if color drifts, so specifications can adapt without delay.
Slabs are secured on galvanized A-frames with foam layers, corner guards, and tensioned straps. A moisture barrier protects faces during transit, and desiccants are added for long sea routes. Tiles and small parts are braced inside wooden crates sized for forklifts and container loading. Each package carries labels with product code, finish, sizes, thickness, and batch details, plus photo logs for receiving checks. Container layouts balance weight and access so unloading stays safe and efficient on busy sites. Shock and tilt indicators are available on request to verify handling from factory gate to site warehouse.
is a versatile and popular natural stone known for its neutral gray tones, which can range from light silvers to darker charcoal shades.
Grey Granite enjoys strong demand in international markets due to its versatile and timeless appeal. It is frequently used in both residential and commercial projects, including countertops, flooring, and wall cladding. The stone’s neutral color and durability make it a popular choice among architects and designers worldwide. As a result, Grey Granite is widely available through global distributors and stone suppliers.
Address: No. 1014, JAM Center, Jamaran St., Niavaran, Tehran, Iran – 1977763988
Email: info@jamstoneco.com
