Goldstone
What is Goldstone?
Goldstone is a type of glittering glass made in a low-oxygen environment. The most common variety is a reddish-brown color with tiny, sparkling crystals of metallic copper. It is typically made by melting silica, copper oxide, and other metal oxides together, then cooling the mixture slowly. The copper crystallizes out of the melt, forming the glittery effect. Goldstone is not a naturally occurring mineral; it is entirely man-made. It is often used in jewelry and ornamental objects.
Optical Properties
- Refractive Index
- 1.54
- Pleochroism
- None
Discover Values
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Goldstone 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.
Goldstone Localities Map
See where Goldstone is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Reddish-brown, blue, green
- Hardness (Mohs)
- 5.5
- Density
- 2.4 g/cm³
- Luster
- Vitreous
Chemical Properties
- Chemical Formula
- SiO2 + Cu
- Elements
- Si, O, Na, Ca, Cu
Also Known As
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Goldstone FAQs
How do I identify Goldstone?
Goldstone can be identified by its hardness of 5.5 on the Mohs scale, Reddish-brown color, Vitreous luster. Look for these key characteristics when examining specimens.
What color is Goldstone?
Goldstone typically appears in Reddish-brown, blue, green. Color can vary depending on impurities and formation conditions.
How hard is Goldstone?
Goldstone has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.