Dolomite rock
Dolomite tumbled
A variety of Dolomite
What is Dolomite rock?
When tumbled, the dolomite rock is smooth and glasslike. Often in shades of red, brown, or orange, they can also be grey or cream. Dolomite rock is found worldwide in sedimentary basins, but particularly Italy and Brazil. It was used as an ornamental embellishment by some Ancient Civilizations and is a collector’s item. Large material is decoratively carved.
Optical Properties
- Refractive Index
- 1.498-1.681
- Birefringence
- 0.179-0.181
- Pleochroism
- None
- Optical Character
- Uniaxial negative
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Dolomite rock before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Where to Find Dolomite rock
Dolomite rock is a variety of Dolomite. RockHoundR, the free-to-download rockhounding map from the Ruby Glint team, shows where collectors find dolomite in the US, with land-access notes for BLM land and national forests. Collecting is banned in national parks.
See where to find dolomiteAlways check the local rules and get the landowner's permission before you collect.
Quick Facts
Physical Properties
- Streak
- White
Chemical Properties
- Chemical Formula
- CaMg(CO3)2
- Elements
- C, Ca, Mg, O
Also Known As
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