Goldstone
Goldstone is a man-made glass filled with cuprous oxide which reduces to metallic copper during later annealing. It gives the material an aventurescent appearance.
Goldstone has been produced in reddish-brown, blue, purple and green colors. It is usually cut en cabochon for use in jewelry as simulant of sunstone. The material can resemble lapis lazuli, if the glass host is blue.
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Goldstone has been produced in reddish-brown, blue, purple and green colors. It is usually cut en cabochon for use in jewelry as simulant of sunstone. The material can resemble lapis lazuli, if the glass host is blue.
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| General Information | |
|---|---|
| A variety or type of: | Glass |
| Physical Properties of Goldstone | |
| Mohs Hardness | 6, Blue Chart Gem Identification (2010) < 6 |
| Specific Gravity | 2.50 to 2.80, Blue Chart Gem Identification (2010) |
| Optical Properties of Goldstone | |
| Refractive Index | 1.530 to 1.550, Blue Chart Gem Identification (2010) |
| Colour | |
| Causes of Colour | Contains flecks of copper giving it its appearance, Management Team (2012) |
| Crystallography of Goldstone | |
| Crystal System | Amorphous, Blue Chart Gem Identification (2010) |
| Further Information | |
| Mineral information: | Goldstone information at mindat.org |