Faceted Gemstone look-alikes
Unknown Gemstone (likely Amethyst or Iolite based on color)
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Open the appSeveral rocks and minerals can be confused with Faceted Gemstone. Below are documented look-alikes and the features that tell them apart. Never rely on a single feature. Always check multiple properties.
Similar rocks to compare
Amethyst
SiO2 (Quartz variety)
Also known as: Purple Quartz
Iolite
(Mg,Fe)2Al4Si5O18 (Cordierite variety)
Also known as: Water Sapphire, Dichroite
Tanzanite
Ca2Al3(SiO4)3(OH) (Zoisite variety)
Also known as: Blue Zoisite
Sapphire
Al2O3 (Corundum variety)
Also known as: Blue Corundum
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