Sandstone
Agra Red Sandstone
India (Uttar Pradesh — Agra)
Sandstone
Montana Sandstone
USA (Montana)
ASTM C616Scratch ResistantExterior-GradeAcid Sensitive
Montana Sandstone
Photo coming soon
HardnessHard(6–7 Mohs)
SoftHard
Acid SensitivityModerate Risk
SafeHigh Risk
Verify Before You Buy
Slab Yard Diagnostic Protocol
Run a quick verification with your Stone ID Kit to confirm the slab matches its label. The two-test routine (scratch + acid) catches most identification errors in the trade.
From your Stone ID Kit
Glass tileHCl dropper bottle (5–10%)
The full step-by-step protocol — including expected results and red flags — is included in your downloadable Buyer's Guide.
Stone TypeSandstone
Geological NameSandstone
OriginUSA (Montana)
ASTM SpecificationASTM C616
ClassificationSiliceous — porous
Available FinishesHoned (Matte), Brushed, Sandblasted
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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.
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