Montana Moss Agate tumbled
A variety of Montana Moss Agate
What is Montana Moss Agate tumbled?
Montana Moss Agate tumbled is a popular moss agate mined in Yellowstone River Valley, Montana, USA. This translucent agate can feature brownish-red bands or characteristic dendritic markings. This abundant material is primarily cut into cabochons, but it's also a favorite ring stone.
Optical Properties
- Refractive Index
- 1.530-1.543
- Birefringence
- 0.003-0.009
- Pleochroism
- None
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Montana Moss Agate tumbled 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.
Quick Facts
Physical Properties
- Streak
- Green
Chemical Properties
- Chemical Formula
- SiO2
- Elements
- Si, O
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