If you would like to include natural pearls in your inventory, you don’t have to pay millions or even thousands of dollars for them—but expect to pay a lot more than you would for cultured pearls of the same quality, size, and shape.
Rubies in North America are so rare that these stones used to be only available to collectors; however, thanks to a new mine in southwestern Greenland, North American rubies are now being sold in jewellery stores.
Using the 4Cs (colour, clarity, cut, and carat weight) to explain diamond pricing was developed by the Gemological Institute of America (GIA) in the 1950s. At that time, cloudy diamonds were considered ‘industrial-grade’ stones and were not set in jewellery.
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