Zambian or Colombian for astrological wear? Oiling, colour, clarity, price and wearing rules — plus the cleaning mistake that destroys emeralds.

In the world of gemstones, two stones can look virtually identical — yet one may carry full astrological power while the other carries almost none. The difference? Heat treatment and chemical enhancement. If you are buying a gemstone for astrological purposes, understanding the concept of unheated and untreated gems is not optional — it is essential. What Does "Unheated" and "Untreated" Mean? In the gem trade, the vast majority of...