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Green Semi‑Granite is a durable decorative stone quarried in eastern Iran’s Birjand region. Its deep forest‑green base scattered with dark biotite grains gives rooms a calm yet distinctive character, whether used for floors, feature walls, or worktops. Because the stone belongs to the semi‑granite family (technically a quartz-monzonite family), it retains most of true granite’s strength while weighing slightly less, which trims cutting time and transport costs. Architects, therefore, choose it for hotel lobbies, kitchen counters, and outdoor paving where heavy traffic and changing weather demand a long‑lasting, low‑maintenance surface.
When quality counts, selecting the right supplier makes all the difference. JAM Stone Co. has spent decades mastering every stage of green semi‑granite production, from holding quarry shares in Birjand to precision cutting on Italian multi‑wire lines. In‑house labs verify colour consistency, thickness, and gloss before each shipment, and ISO as well as CE marks back their claims. Export teams coordinate custom crating, fumigated pallets, and on‑time ocean freight to GCC, European, and East‑Asian ports. Whether serving architects, slab wholesalers, or project developers, JAM Stone Co. ensures that every slab of green semi‑granite meets the expectations of quality‑driven projects worldwide.
Green Semi‑Granite belongs to an igneous group known technically as quartz‑monzonite, yet Iranian sellers often label it “semi‑granite” to highlight the balanced mix of quartz and feldspar. Slow cooling of magma locked these minerals into an interlocking mesh that gives the rock its famous durability and high polish. Colour ranges from jade to pine, sometimes crossed by thin creamy quartz veins that produce dramatic book‑match patterns. Trade names such as Iranian Green Granite or Forest Green all refer to the same deposit, located near Birjand, which supplies uniform blocks year‑round.
Independent tests by Iranian and European laboratories show green semi‑granite averages more than 200 megapascals in uniaxial compressive strength and roughly 17 megapascals in flexural strength at twenty‑millimetre thickness. Bulk density stays near 2.70 grams per cubic centimetre and open porosity seldom exceeds 0.3 percent, numbers that mean slabs shrug off heavy pedestrian loads, machinery vibration, and repeated freeze‑thaw cycling. The compact grain also allows CNC routers to cut crisp profiles and keeps sawn edges from chipping during installation.
Green semi granite contains roughly 30 percent quartz, 35 percent alkali feldspar, 25 percent sodic plagioclase, and the balance dark biotite plus hornblende. This even distribution yields both hardness and subtle sparkle: quartz glints under light while feldspar lends the deep green tone. Accessory magnetite and epidote trace lines remain invisible after polishing.
Measured bulk density ranges from 2.65 to 2.75 grams per cubic centimetre, placing the stone firmly within the granite category. Such mass keeps tiles stable on heated floors and limits vibration when used as machine‑shop benches. Low pore volume below 0.3 percent stops water ingress and staining.
Uniaxial compressive strength surpasses 200 megapascals, a figure that enables thin countertops to span wider cabinet gaps without plywood backing. Flexural strength around 17 megapascals means exterior cladding panels can handle wind loads on high‑rise façades. When properly anchored, three‑centimetre pieces resist impact from rolling luggage or service carts in hotel corridors.
On the Mohs scale, the stone rates between six and seven, so ordinary steel knives or dropped keys rarely leave a mark. This hardness also preserves crisp arris lines on chamfered edges, reducing the need for frequent repolishing in busy commercial spaces. Diamond pads still cut efficiently, keeping fabrication times competitive.
Natural flaws are minimal. Fine biotite stringers under half a millimetre run parallel to foliation but vanish after resin treatment. Occasional hairline fissures thinner than 0.3 millimetres are pressure‑filled with clear epoxy, ensuring structural integrity and gloss continuity. Voids or clay pockets are rare due to the stone’s crystallisation environment.
When polished, green semi‑granite offers a bright mirror that helps rooms feel lighter. Colour stays stable under sun because the mineral mix does not fade. Leathered or brushed surfaces reduce glare and add grip, which is useful for wet zones such as pool decks and bathrooms. The silica‑rich content means weak food acids like lemon juice do not etch the face, yet an impregnating sealer every three to five years blocks oil stains. Regular care needs only pH‑neutral cleaners and soft cloths.
The slab presents a deep evergreen field scattered with almost black mica flecks that sparkle under spotlights. Pale quartz ribbons sometimes sweep diagonally, letting installers mirror them for striking book‑match murals behind reception desks. Because pattern density is moderate, seams vanish easily, so large walls look like one continuous sheet of colour.
Standard polishing creates a mirror exceeding 58 gloss units, ideal for bright lobbies. Honed pieces soften reflection to suit minimalist kitchens, while leathering introduces micro‑pits that mask fingerprints and deliver pleasant tactile warmth. A flamed then brushed sequence roughens the surface for patios where barefoot safety and muted colour are priorities.
Laboratory freeze–thaw cycling shows no spalling after 56 repetitions at minus fifteen degrees Celsius, proving reliability in alpine resorts. Accelerated ultraviolet exposure of 2000 hours records a colour change below 2 Delta‑E, invisible to the naked eye. Salt‑fog trials confirm brushed finishes withstand de‑icing chemicals applied to city sidewalks in winter.
Silica‑rich composition means household acids such as lemon juice or diluted vinegar cannot etch the surface, though they may dull the applied sealer. A yearly water‑drop test helps owners decide when to re‑apply impregnators. Neutral‑pH detergents remove grime without haze, and alkali cleaners disperse oil spatter on restaurant counters safely.
When inspected with a standard gloss meter at a sixty‑degree angle, polished slabs consistently read above fifty‑eight units, approaching the brilliance of glass. This high reflectance bounces daylight deeper into rooms, allowing designers to reduce artificial lighting loads. Even after ten years of public use, repolishing normally restores mirror quality quickly.
Birjand quarry yields blocks of forest semi granite averaging 280 by 170 by 120 centimetres, dimensions that let factories slice generous gangsaw slabs. After sawing, producers supply panels up to 320 by 190 centimetres in twenty‑ or thirty‑millimetre thickness, suitable for full‑height lobby walls. Standard tiles—sixty by sixty, sixty by thirty, and thirty by thirty centimetres—cover residential floors with less cutting waste. For landscaping, flamed pieces measuring sixty by forty by three centimetres achieve slip‑resistance class R12. Water‑jet machines also fabricate custom stair treads, skirtings, and complex inlays on request.
Factory gangsaws deliver full slabs ranging from 280 to 320 centimetres in length and 160 to 190 centimetres in height, with thickness options of two or three centimetres. These large formats enable book‑matching across entire reception walls and minimise horizontal joints when cladding elevator surrounds.
Standard tile sets include 600 by 600 millimetre squares, 600 by 300 millimetre rectangles, and 300 by 300 millimetre modules. Thickness varies between 12 and 20 millimetres, allowing installers to coordinate floor and wall coverings in bathrooms, kitchens, and corridors without complicated substrate adjustments.
CNC routers shape stair treads, risers, countertop blanks, and curtain‑wall panels to exact drawings. Edges can receive bullnose, ogee, or 45 degree mitres for waterfall ends. Because the stone’s hardness limits chipping, fabricators achieve tight tolerances that reduce on‑site grinding, saving both installation time and noise in occupied buildings overall project schedules.
Water‑jet equipment slices thin pieces of green semi granite into hexagon, chevron, arabesque, and herringbone shapes, which are fixed onto mesh backings for quick layout. Each sheet is ten millimetres thick, so weight stays manageable on vertical spa walls. The rich green colour pairs well with brass fittings and creamy marble accent strips for stylish contrast.
For terraces and pool surrounds, flamed and then brushed pavers measuring 600 by 400 by 30 millimetres reach slip‑resistance class R12 even when wet. Dense structure prevents salt crystallisation during winter de‑icing, and muted colour hides dust, making the format popular at resorts that aim for understated natural looks.
Baseboards cut to 100 millimetres high and 18 millimetres thick complete installations by hiding floor tile edges. A subtle bevel on the exposed top face eases cleaning brooms while echoing stair nosing details. Because pieces come from the same slab batch, colour continuity between wall and floor remains exact.
Green semi granite’s dense structure and low water absorption make it useful for both interior and exterior surfaces. Polished slabs perform well on hotel reception desks and kitchen islands where hygiene and shine matter. Honed or leathered tiles lay on high‑traffic lobby floors, because 200‑MPa compressive strength resists trolley wheels. Outdoors, flamed pavers withstand freeze–thaw cycles and maintain R12 grip around swimming pools. Panels only 30 mm thick handle façade wind loads if back‑anchored. Bathroom walls benefit from the stone’s acid resilience, while driveway curbs remain intact under vehicle weight.
Market price for Persian green semi‑granite reflects both quarry scarcity and processing sophistication. FOB quotations for polished 20‑mm slabs usually range from twenty‑five to fifty‑five US dollars per square metre. Variance arises from colour uniformity, block size, and factory finish, while seasonal shipping costs add further fluctuations. Buyers must also consider cutting waste: dense material yields high; however, extra diamond tooling raises factory overhead. The bullet list below outlines the chief cost drivers so project estimators can compare suppliers on consistent criteria.
Visual grading focuses on base‑colour consistency and absence of white quartz streaks wider than three millimetres. Premium A slabs of green semi-granite with uniform deep green command prices up to fifteen percent higher than mixed‑tone B material. Carefully filled micro‑fissures are acceptable, but open cracks or iron spots push pieces into budget category.
Quarry benches release 12‑ to 16‑tonne blocks that fit gangsaws efficiently. Large, crack‑free masses produce more first‑choice slabs per cubic metre, lowering unit cost by spreading quarry and sawing expenses. Smaller blocks below eight tonnes increase waste and add about three dollars per square metre in finished product for export orders.
Factories equipped with multi‑wire saws, vacuum resin lines, and sixteen‑head polishers deliver surfaces exceeding fifty‑eight gloss units and thickness tolerance below 0.5 millimetre. Higher capital investment raises production costs, yet it reduces on‑site grinding and breakage, saving contractors labour. As a result, top‑end finishing adds roughly two dollars per square metre.
Polished slabs serve interior counters and walls, while flamed‑and‑brushed textures cater to outdoor pavers. Each extra finishing pass—flaming, brushing, leathering—requires energy and abrasive wear, adding between one and three dollars per square metre. Buyers should match finish to slip‑resistance targets so they avoid paying for unnecessary processing on low‑traffic indoor zones.
Standard twenty‑millimetre slabs balance rigidity and weight, but projects demanding thirty‑millimetre stock pay a material premium of up to twenty‑five percent and higher freight. Oversized panels longer than 320 centimetres require special A‑frame packaging and sometimes less‑than‑container‑load shipments, lifting logistics by around eight percent compared with regular bundles in final quotes.
Proximity to Bandar Abbas port keeps inland haulage under five dollars per square metre, but high‑season container shortages can inflate ocean freight by ten percent. Peak construction months in the Gulf and Europe also reduce quarry stocks, prompting suppliers of Persian forest semi granite to impose surcharges. Early scheduling secures capacity and stabilises budgets for large facade contracts.
Extraction of Persian green semi granite begins with diamond‑wire cutting on 12‑metre quarry faces, isolating blocks that are gently toppled by hydraulic jacks to avoid micro‑cracks. After trimming, each block travels 900 kilometres to the company’s plant, where multi‑wire saws slice slabs in a closed‑loop water system. Vacuum resin fills micro‑fissures, and sixteen‑head polishers bring the gloss above fifty‑eight units. Digital scanners verify colour matching before slabs are numbered, foam‑wrapped, and strapped to steel‑reinforced wooden A‑frames. Finally, containers are fumigated, sealed, and trucked to Bandar Abbas for weekly sailings to Europe, Asia, and the Gulf.
Installers should set green semi‑granite with a high‑performance C2TE S1 cementitious adhesive or an epoxy spot‑bond on façade panels. Grout joints between two and three millimetres filled with stain‑proof epoxy help preserve colour. After polishing dust is removed, apply a penetrating silane‑siloxane sealer and repeat every three to five years, verifying with a water‑drop test. Avoid acidic cleaners that strip sealant and steel wool that scratches mica. Back‑butter large tiles to eliminate voids, and protect freshly laid floors from heavy traffic for at least twenty‑four hours.
JAM Stone Co. controls every stage of green semi granite production through integrated operations that link Birjand quarries to advanced plants in Isfahan. Long‑standing partnerships with local mine owners secure block quotas even during high demand. Inside the factory, water‑jet cutters, multi‑wire saws, and precision polishers operate under ISO‑9001 procedures, while in‑house labs test thickness and gloss for each batch. This closed value chain lets the company maintain batch consistency, fast lead times, and competitive pricing for architects who need reliable evergreen stone on tight schedules.
JAM Stone Co. follows a six‑stage inspection regime that checks raw block integrity, saw‑cut surface quality, resin cure, final gloss, dimensional accuracy, and packing security. The company holds ISO 9001, ISO 14001, and CE EN 1469 certifications and exports regularly to GCC, European Union, and East Asian markets. Minimum order starts at a single bundle for boutiques, while full‑container loads suit megaprojects. Dedicated logistics teams arrange CFR, CIF, or DDP terms, offer client‑specific cutting, and track shipments to ensure on‑time arrival even during peak seasons.
The Persian Forest Semi Granite comes from JAM Stone Co. ‘s partnered pit on the Birjand batholith, a late‑Triassic quartz‑monzonite body famed for its consistent emerald tone across forty hectares of reserve. Exclusive access means colour and grain stay uniform year after year, giving architects confidence in long‑term supply. Wire‑saw extraction minimises waste and reduces blasting dust, aligning with the company’s ISO 14001 environmental goals. Continuous core drilling maps reserves, allowing strategic planning that protects the landscape while guaranteeing at least twenty years of workable material.
Finished slabs stand upright on steel‑braced wooden A‑frames, each face protected by two‑millimetre foam sheets and shrink wrap. Tiles and mosaics stack flat in ISPM‑15 crates lined with moisture‑barrier film. Corner guards and ratchet straps stop movement during transit, while silica‑gel sachets keep humidity low on sea voyages. Container loads are balanced to 24–27 tonnes to cut freight per square metre and reduce breakage. Labels list batch code, thickness, and piece count, and QR tags streamline warehouse scanning on arrival for quick inventory reconciliation.
It is a quartz‑monzonite stone with jade to pine tones, strong interlocking crystals, and high polish, sourced from quarries near Birjand.
Green Semi-Granite has gained popularity in international markets due to its distinctive aesthetic and durability. Designers and homeowners across North America, Europe, and Asia are increasingly incorporating this stone into both residential and commercial spaces. Its versatility and striking appearance make it a sought-after choice for luxury projects, creating a lasting impression in kitchens, bathrooms, and beyond. As global demand for natural stone continues to grow, Green Semi-Granite stands out as a premium option, blending beauty and functionality in every application.
Address: No. 1014, JAM Center, Jamaran St., Niavaran, Tehran, Iran – 1977763988
Email: info@jamstoneco.com
