150 Ashley Road, Hale,

Cheshire, WA15 9SA

0161 233 9977


Third Floor, St Johns Court, 19B Quay Street,

Manchester, M3 3HN

0800 080 3535


5 St Christopher’s Pl, Marylebone,

London, W1U 1NA

020 33 271 271

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Gemstone Size

Discover all you need to know about diamonds, coloured gem stones, precious metals, setting styles for different gem stone and diamond shapes and how we manufacture jewellery at Steven Stone.

What to Look For

We would always recommend visiting one of our stores and consulting a Steven Stone expert before purchasing gemstone engagement rings or other gem set jewellery. We can source a wide selection of precious gemstones in various sizes and cuts. Our specialists can help you find the best stone to perfectly match your preferences and budget.

Gemstone size is measured in millimeters and the given dimensions differ for gemstone shapes. The round gemstone shape is measured in diameter and depth, while ovals and fancy shapes are measured in depth, length and width.

Gemstones Size

Expert Tip

"When shopping for gemstones online, always request both the carat and dimensions of the stone."

Every Gemstone Is Unique

As with diamonds, the carat weight of gemstones doesn’t necessarily affect the stone’s size. Depending on their origins and unique elements, two stones from the same variety and size may have different densities and therefore, different carats. When selecting a gemstones for an engagement ring or gem set jewellery, consider the size rather than carat.