The market encompasses hundreds of stone varieties, formerly known as "semi-precious stones", some of which buy and sell at prices far exceeding those of diamonds, emeralds, rubies and sapphires — historically referred to as "precious stones".
Understanding market trends is essential, as are the most stable options, which can depend in particular on provenance. Every gemstone has its own singular character, and when looking to buy precious stones, comparison is key.
A gemological laboratory certificate is indispensable — sometimes two (GIA, LFG…). The diamond remains the classic safe-haven stone, yet true diversification of such a holding is strongly advisable: spinels, tourmalines, aquamarines and tsavorites are all worthy considerations.