• Most authentic gold jewelry is stamped with some sort of indicator. The term "karat" (usually abbreviated as "k," "K," or "Kt") refers to the purity of gold.
• (10k or 417): 41.6% pure gold (10 parts out of 24) | Usually the alloys are silver, copper, zinc, and nickel

• (14k or 583): 58.3% pure gold (14 parts out of 24) | Usually the alloys are silver, copper, zinc, and nickel

• (18k or 750): 75% pure gold (18 parts out of 24) | Usually the alloys are silver, copper, nickel, and palladium (for white gold)

• (22k or 916): 91.6% pure gold (22 parts out of 24) | Usually silver and copper

• (24k or 999): 100% pure gold (24 parts out of 24) | None

The 24kt gold will be softest and then 10kt the strongest due to the alloys percentages added to the gold.

How about Platinum?

• (900 Platinum or 900Pt: 90% pure platinum (900 parts out of 1,000) | Ruthenium, rhodium, palladium, and other platinum group metals

• (950 Platinum also PLAT, PT, 950 Plat, Plat 950, Pt950, 950Pt): 95% pure platinum (950 parts out of 1,000) | Ruthenium, rhodium, palladium, and other platinum group metals

What does the 925 stamp indicate?

• (925): Sterling Silver | 92.5% pure fine silver | Usually the alloy is copper

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