Total carat weight:
Total Carat Weight or TCW refers to combined carat weight of more than one diamond.
When you purchase a pair of diamond stud
earrings, each diamond may weigh .50 ct. for a combined
carat weight total of 1 ct. tw.
.50ct. = 1 carat or 1 ct. tw.
To learn more, read our section on 'carat weight'.