Gemstone Size Charts
Carat-to-MM size charts for 36 gemstones in 13 different shapes, alltogether 468 interactive charts.
Browse Gems (36)
- Alexandrite
- Almandine
- Amethyst
- Andesine
- Apatite
- Aquamarine
- Benitoite
- Beryl
- Chrysoberyl
- Citrine
- Cubic Zirconia
- Diamond
- Diaspore
- Diopside
- Emerald
- Fluorite
- Hiddenite
- Kunzite
- Kyanite
- Moissanite
- Morganite
- Peridot
- Pyrope
- Quartz
- Rhodolite
- Ruby
- Sapphire
- Sinhalite
- Spinel
- Sunstone
- Tanzanite
- Titanite
- Topaz
- Tourmaline
- Tsavorite
- Zircon
Did you know? Gemstones of the same size can weigh very differently. And gemstones that weigh exactly the same can look noticeably different in size. One of the main reasons for this is specific gravity or relative density. Compare densities of 36 gemstones with the specific gravity chart.