Question 1

How is gem weight measured?

Accepted Answer

In metric carats (ct). 1 ct = 200 mg. Points for precision (100 points = 1 ct). Weight significantly affects price.

Question 2

Does carat weight affect diamond price?

Accepted Answer

Yes, exponentially. 1 ct diamonds cost much more than 2 × 0.5 ct. Larger stones are rarer and more desirable.

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.

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