What is Goldstone primarily made of?

Goldstone is primarily made of glass that contains small copper crystals. This man-made material is created through a process of melting glass together with copper salts, which results in the shimmering effect that is characteristic of Goldstone. The presence of these tiny, metallic copper crystals suspended in the glass gives it a sparkling appearance, resembling that of naturally occurring stones.

Goldstone is not a natural mineral but rather a synthetic gemstone, which differentiates it from other options that mention natural materials. The other choices refer to various minerals and natural processes rather than the specific materials involved in creating Goldstone. This clarity helps in understanding Goldstone's unique composition compared to other gemstones.