Essential knowledge for every jewellery buyer.
CARAT (ct)
Measures the weight of gemstones.
1 carat = 0.2 grams
(200 milligrams)
Used to measure diamonds, rubies, emeralds, sapphires and other precious gemstones.
WHAT IS CARAT?
- Refers to the gemstone weight.
- Affects the size of the stone.
- Two diamonds of the same carat weight can look different due to the cut, shape and proportions.
GEMSTONE FACTS
- Carat is only the weight and does not determine the quality on its own.
- Cut, color and clarity affect the beauty and value of a diamond much more.
KARAT (K)
Indicates the purity of gold.
24K = 99.9% Pure Gold
22K = 91.6% Pure Gold
18K = 75.0% Pure Gold
14K = 58.5% Pure Gold
10K = 41.7% Pure Gold
Shows how much pure gold is present in an alloy.
WHAT IS KARAT?
- Refers to the purity of gold.
- Affects the color, value and durability.
- Higher karat = more pure gold (softer).
- Lower karat = more durable (stronger).
GOLD PURITY GUIDE
24K = 99.9% Pure Gold
22K = 91.6% Pure Gold
18K = 75.0% Pure Gold
14K = 58.5% Pure Gold
10K = 41.7% Pure Gold
“Knowledge is the most precious jewel.”
Choosing the right jewellery goes beyond understanding carat and karat. Explore our Diamond Guide to learn more about diamond quality, clarity, color and cut. For internationally recognized information on diamonds and gemstones, you can also visit the Gemological Institute of America (GIA).
Murat Koç — Jewellery Expert
TIMELESS VALUES
ALWAYS WITH YOU
BYKOC
ISTANBUL | NEW YORK