Quartzite
Tempest Black
Brazil
Quartzite
Elbrus Quartzite
Brazil
ASTM C615Food-Contact EligibleEtch ResistantScratch ResistantHeat ResistantFrost ResistantExterior-GradeVerified Quartzite
Elbrus Quartzite
Photo coming soon
HardnessVery Hard(7 Mohs)
SoftHard
Acid SensitivityAcid Safe
SafeHigh Risk
Verify Before You Buy
Slab Yard Diagnostic Protocol
Quartzite is widely mislabeled in the trade — slabs sold as quartzite are sometimes dolomitic marble (e.g., Super White) or hybrid marble/quartzite layers (e.g., Fantasy Brown). Before you commit, run two quick tests from your Stone ID Kit to confirm the slab is genuine quartzite.
From your Stone ID Kit
Glass tileHCl dropper bottle (5–10%)Knife or steel scribeMagnifier
The full step-by-step protocol — including expected results and red flags — is included in your downloadable Buyer's Guide.
Stone TypeQuartzite
Geological NameMetamorphic quartzite — VERIFY (some 'quartzites' are dolomitic marble)
OriginBrazil
ASTM SpecificationASTM C615
ClassificationDense Crystalline / Siliceous
Available FinishesPolished, Honed (Matte), Leathered, Brushed
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Resin Fill Present
Like most Brazilian quartzites, Elbrus Quartzite may contain polyester resin fill to stabilize the stone. In areas with significant direct sunlight, the resin can gradually yellow over time. Ask your supplier about the type of resin used — UV-stable epoxy resin is less prone to yellowing than standard polyester resin.
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Classification Disputed — Test Recommended
The geological classification of Elbrus Quartzite is disputed in the industry. Different suppliers may classify it differently. We strongly recommend requesting a petrographic test from an independent laboratory before purchasing, especially if acid sensitivity or hardness is critical for your application.
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MB Stone I.D. Kit — Test Your Stone
Not sure what stone you have? This kit includes the tools professionals use to identify stone type, test acid sensitivity, check absorption, and determine the right care products.
Shop Stone I.D. Kit — $139.97HardnessVery Hard(7 Mohs)
SoftHard
Acid SensitivityAcid Safe
SafeHigh Risk
LOW — siliceous stone; does NOT etch from household acids.
🔥Heat Tolerance
>480°F (250°C)
💧Sealer
Yes (impregnator)
Technical Details
ASTM SpecificationASTM C615
Mohs Hardness7
Absorption0.05–0.40%
Density (pcf)160–175
Compressive Strength (psi)19,000–35,000+
Flexural Strength (psi)≥1,200
Abrasion Resistance (Ha)25–50+
Thermal Tolerance>480°F (250°C)
ClassificationDense Crystalline / Siliceous
Geological NameMetamorphic quartzite — VERIFY (some 'quartzites' are dolomitic marble)
OriginBrazil
Where can you use Elbrus Quartzite?
Tap an application to see the full recommendation.
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Interior
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Exterior
Recommended Conditional Not Recommended
Care Instructions
Maintenance recommendations for Elbrus Quartzite
🧹 Daily Cleaning
- Wipe surfaces with a soft, damp cloth or microfiber towel
- Use a pH-neutral stone cleaner — never use acidic or abrasive products
💧 Sealing Schedule
- Sealer type: Yes (impregnator)
- Seal every 1–2 years for normal residential use
- Test with water drops — if absorption occurs within 10 minutes, it's time to reseal
- Always clean the surface thoroughly before applying sealer
- Allow sealer to cure fully before using the surface (typically 24 hours)
⚠️ Warning Signs — Time to Call a Pro
- Dull spots or rings where liquids have sat on the surface
- Visible cracks, chips, or separating seams
- Discoloration or staining that won't clean away
- Surface feels rough or gritty in areas that were previously smooth
- Grout deterioration around the stone edges
🛒 Recommended Products
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pH-Neutral Stone Cleaner
For daily cleaning. Avoid acidic or alkaline cleaners.
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Impregnating Sealer
Penetrates the stone to protect from within. Apply annually.
Need professional help?
Get a free consultation from Sureshine’s stone care experts.
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