CZ has a Moh’s hardness of 8.5. That means it is a hard and durable gem although not as hard as diamond. Most CZ can be described as colorless, and most have high clarity with minute, if any, ...
As a consumer, you will regularly encounter in the marketplace gems that have been treated to change their appearance. A topic that often comes up is whether a particular gemstone is or isn’t treated.
The rarity of precious gemstones comes down to the geologic process of their formation. Sparkling diamonds and verdant emeralds are some of the most coveted and priciest gemstones. But which ...