Question 1

How many grams is a carat?

Accepted Answer

1 carat = 0.2 grams = 200 milligrams. Metric carat standardized in 1907. Used for diamonds and gemstones.

Question 2

Is carat for gems different from gold karat?

Accepted Answer

Yes\! Carat (ct) measures gem weight. Karat (K) measures gold purity: 24K = pure gold, 18K = 75% gold.

Question 3

Is there a difference between mass and weight?

Accepted Answer

Yes! Mass (kg) is amount of matter, constant everywhere. Weight (newtons or pounds-force) is gravitational force on mass, varies by location.

Question 4

Why do jewelry and precious metals use different units?

Accepted Answer

Troy system (troy ounces, pennyweights) has been used for precious metals since the Middle Ages. 1 troy oz = 31.1g vs 1 regular oz = 28.35g.

ct to g Converter

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