Ask the Experts about Jewelry Making

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Topics: Faceted Gems, Sizing by carat

Q.
I have several 1-carat marquise-shaped gems. What would their metric measurement be? The stones are blue sapphire, amethyst, garnet, midnight blue sapphire, mystic topaz. I also have a 5-carat round white sapphire. Again, what is the measurement?
- Sharon
A.
The best way to determine the measurement of your faceted gemstones is to measure them with a caliper or a slide gauge. Another way to get a close estimate is by referring to the ''Faceted Gemstone Weight and Size Charts'' to determine the size of your stones.

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