Carat & Millimetres

How big a weight looks — and what a measured stone weighs.

Direction

Shape

Carat weight

ct

The weight you are considering.

Face-up size

6.44 mm

6.44 mm across · about 3.96 mm deep

Drawn to scale · 10 mm fills the plate

1.00 ct round · 0.200 g

A carat is 0.200 g exactly, and a 1 ct round sits near 6.4–6.5 mm. Weight read from measurements is an estimate — a girdle thicker or thinner than usual will move it.

Beyond the Measurement

Have the stone recorded

A measurement is a fact. A record is permanent.

Begin an enquiry