The Antique Jewellery Company
SALE Latest Finds What's Hot Expert Picks The Archive Eras Collections
Contact Book Appointment
Wishlist Sign In
The Antique Jewellery Company
The AJC Summer Sale
The Antique Jewellery Company Experts since 1975Read Our Story
The Antique Jewellery Company
The Antique Jewellery Company Blog

Carat

The unit of weight for a diamond or other gemstone and also for a pearl. Abbreviated ‘ct’, 1 carat is equal to 0.2 grams.

In reference to gold, a unit of purity or fineness of gold and gold alloy, expressed as a number out of 24 parts by weight, e.g. ’24 carat’ signifies pure gold, ’18 carat’ 18/24th gold in the alloy, et cetera.  Also abbreviated as ‘ct’.

Originally derived from the carob seed, called quirat in Arabic, a seed of naturally uniform weight.

Back to Glossary