Jet tumbled
A variety of Jet
What is Jet tumbled?
Jet is a very dark stone, prized for its lustrous and glossy surface. The material is found in France, England, Spain, USA, Poland, and Turkey and polishes very nicely. It is used for carved and engraved articles such as beads, buttons, rings, seals, but large specimens are commonly faceted.
Optical Properties
- Refractive Index
- 1.640-1.680
- Pleochroism
- None
- Optical Character
- Isotropic
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Jet 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
- Brown
Chemical Properties
- Elements
- C, O, S, H
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