Unit of weight for gemstones and pearls, equal to 200 milligrams.
このダイヤモンドは1カラットです。
This diamond is one carat.
Measure of gold purity; 24 karat is pure gold. Often written as K24, 18K, etc.
この指輪は18カラットの金でできています。
This ring is made of 18-karat gold.
She received a ring with a one-carat diamond.
This necklace is made of 18-karat gold.