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Crystal Quartz Stone Slab

Product Name :Gery Crystal Quartz Stone Slab
Raw Materail :93% Natural Quartz Sand & Resin
Standard Quartz Slab Size:3200x1600cm or 3000x1400cm Thickness 15/18/20/30mm
Advantage :Cheap with good quality

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Product Introduction

Grey crystal quartz stone slab is an engineered stone, not a quarried one: 93% natural quartz sand is blended with 7% polyester resin and pressed under vacuum into a 3200x1600mm or 3000x1400mm slab. The crystal in the trade name is mirror flake, ground fine and dispersed through a grey base, and what separates a sound grey crystal quartz slab from a poor one is whether that flake sits evenly through the slab or collects in bands you only see once the slabs are stood upright on the shop floor. Because the colour is a formulation rather than a geological accident, this quartz slab is held to Delta E 1.0 from one production batch to the next, which is the number a distributor should actually be buying on: a repeat order matches the sealed master sample.

Parameter	Specification
Product Name	Grey Crystal Quartz Stone Slab
Material	Engineered quartz, 93% natural quartz sand and 7% polyester resin
Colour / Pattern	Grey base with mirror flake evenly dispersed through the body; shade adjusted to customer requirement on volume orders
Standard Slab Size	3200x1600mm and 3000x1400mm; other sizes cut to drawing
Thickness	15mm, 18mm, 20mm, 30mm
Thickness Tolerance	+/-1mm as standard; +/-0.5mm on calibrated orders, checked with a caliper across the slab
Surface Finishes	Polished, honed. Flamed, bush-hammered, sandblasted and pineapple finishes belong to natural stone and are not applicable to resin-bonded quartz
Edge Profiles	Flat eased, bevelled, half bullnose, full bullnose, radius, ogee, laminated, mitred waterfall
Density	2.3 to 2.4 g/cm3 (2,400 kg/m3)
Weight	About 48 kg per square metre at 20mm; one 3200x1600mm 20mm slab about 246 kg
Water Absorption	Under 0.02%
Compressive Strength	220 MPa, 32,000 psi
Flexural Strength	48 MPa average, 7,000 psi
Mohs Hardness	7
Colour Consistency	Delta E below 1.0 from batch to batch, read against the sealed master sample
Sink Cutouts	Undermount, drop-in and vessel; minimum 10mm inside corner radius; cut from your sink template
Faucet Holes	Single, 4 inch centre-set or 8 inch widespread, cut from your tap template
Backsplash	2 inch, 4 inch, 6 inch or full height
Sealing	Not required; the surface is non-porous. No sealer, no re-polishing programme
Application	Kitchen countertops and islands, vanity tops and washstands, backsplash and interior wall cladding, reception and desk tops, table tops, window sills, hospital and laboratory worktops
Outdoor Use	Interior use. Not suitable for uncovered exteriors: direct UV yellows the resin binder
MOQ	One bundle, about 15 slabs. Small trial quantities accepted
Delivery Time	About 10-15 days for one 20GP container
Packing	Slabs stood vertically in A-frame wooden bundles with protective film, corner protectors and a moisture barrier; ISPM 15 fumigated packing
Payment Terms	30% T/T in advance, balance against copy of B/L; L/C accepted
Port of Loading	Xiamen, China
Documents	Third-party test report taken against the batch on request

Quality Standards

Quality Control & Inspection Standards

YoYo Stone enforces a rigorous six-stage quality verification protocol for every commercial production run of white marble:

Raw material intake and batching by weight

Quartz sand is checked on particle size distribution and the resin lot is logged with supplier and batch number, because an unsorted sand blend packs badly and leaves microscopic voids. The 93 to 7 ratio is weighed on digital scales, never judged by eye, and the batch sheet follows the slab.

Vacuum vibro-compression

Air is drawn out of the mix under vacuum below 10 mbar while high-frequency vibration settles the quartz particles into their densest arrangement. This is the step that decides porosity: water absorption under 0.02% is a result of it, not a claim laid on afterwards.

Curing control

Temperature and humidity are monitored through cure, because under-cured resin reads as dull patches on the polished face and shows as hairline cracks around cutouts six to twelve months after installation.

Calibration and flatness

Thickness is held with a caliper across the slab rather than at one point, to +/-1mm as standard and +/-0.5mm on calibrated orders, so that seams between two slabs need no grinding to sit level.

Gloss reading slab by slab

The polished face is read with a gloss meter against the batch standard. Eyeballing gloss under workshop lighting is how dull slabs leave a factory, so the reading is recorded per slab.

Products Application

Typical Project & Application Scenarios

Kitchen countertops and islands

Crystal quartz stone slab at 20mm laid on a substrate with the overhang supported, or 30mm and 20+20mm laminated where the edge is exposed and a 40mm front is wanted. The face is non-porous, so oil, wine and citrus sit on the surface instead of soaking in, and the everyday cleaning regime is a damp cloth rather than a sealer programme.

Vanity tops, washstands and bathroom vanities

20mm tops with undermount, drop-in or vessel basins, drain grooves and faucet holes cut from your templates. A non-porous surface is the practical argument in a bathroom, and it is why hospital and laboratory worktops are specified in the same material. The crystal grey is the workhorse of this range: it hides soap and water spotting that a pure white slab shows up.

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Backsplashes, window sills and interior wall cladding

Book-matched pairs of grey crystal quartz where a vein or flake pattern has to run across two panels, in 2 inch, 4 inch, 6 inch or full-height backsplash sections, cut from the same bundle as the countertop so the flake density matches between the two.

Commercial and hospitality fit-out

Hotel bathroom vanities, restaurant and cafe tabletops, reception and desk tops, retail display and fitting, bank counters. The argument at this scale is batch consistency, because a hotel that refits a wing two years later needs the second order to match the first.

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FAQ

Everything You Want To Know

01. How do you keep grey crystal quartz slab colour consistent between containers? Every production batch is read?

against the sealed master sample with a spectrophotometer and released only under Delta E 1.0. We keep a retained slab from your first shipment and check the next container against it, so a repeat order does not arrive a shade lighter.

02. Does the mirror flake chip out when the slab is cut for a sink?

The flake is fine glass dispersed in resin, so it cuts cleanly on a water-cooled blade. The failure we guard against is a stressed corner: sink cutouts are relieved to a 10mm minimum inside radius, and edges are checked chip by chip before the bundle is closed.

03. How many slabs are in one bundle, and how does that affect container loading?

One bundle is about 15 slabs, roughly 77 square metres and 3.7 tonnes in 20mm. A 20ft reaches its 27 tonne payload at about 560 square metres, so quartz slab is loaded by weight and braced vertically in A-frame bundles.

04. Can grey crystal quartz slab be used on an uncovered hotel terrace?

No. The resin is the weak point: prolonged direct UV yellows the binder and dulls the face, and thermal cycling on an exposed terrace works the same seams. Under a canopy it is fine; for open air, specify granite or a porcelain slab instead.

05. Does a crystal quartz stone slab need sealing, and can it take a hot pan?

It does not need sealing: water absorption is under 0.02%, so there is nothing for a sealer to fill. Heat is the real risk. The resin softens well below cooking temperature, so use a trivet and never set a hot pan straight off the hob.

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