Quartzite

Ijen Blue

Brazil

ASTM C616Food-Contact EligibleScratch ResistantHeat ResistantFrost ResistantExterior-GradeVerified Quartzite

Ijen Blue

Photo coming soon

HardnessVery Hard(7–8 Mohs)

SoftHard

Acid SensitivityLow Risk

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 NameQuartzite

OriginBrazil

ASTM SpecificationASTM C616

ClassificationDense Crystalline / Siliceous

Available FinishesPolished, Honed (Matte), Leathered, Brushed

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Resin Fill — UV Yellowing Risk

Ijen Blue is typically filled with polyester resin during processing to stabilize micro-fractures and enhance appearance. This resin can yellow over time when exposed to direct sunlight or UV light. This yellowing is irreversible and most noticeable on white, light-colored, and blue stones. For areas with direct sun exposure (near windows, outdoor kitchens, sunrooms), discuss UV-stable epoxy resin options with your fabricator, or consider placement away from prolonged direct sunlight. Ask your supplier whether the slab uses polyester or UV-stable epoxy resin.

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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 — $139.97