This page lists all the various symbols in the Miscellaneous category.
Symbols without any special category attribution but that are widely used worldwide.
Symbols in this category:
Opal is one of the “oddballs” of the gemstone family. Composed primarily of hardened silica, its water content is much higher than most crystalline gems (around 10% of the total mass of many specimens). This makes opals fairly fragile and can cause them to crack easily. On the other hand, opals' high water content and delicate silica structure- which causes their characteristic rainbow coloring- are both key contributors to the stone's symbolic meaning.