The Gemstone Encyclopedia
Discover the world's most beautiful gemstones. Properties, origins, comparisons, and expert guides — all in one place.
Today's Gemstone
Bloodstone (Heliotrope)
Semi-Precious Gems
Bloodstone is dark green chalcedony with vivid red jasper spots, used for seals and talismans since ancient Rome. Finest material from Gujarat, India.
Featured Gemstones
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Hardness: 4.0
Pyrope
Hardness: 7.0
Rhodolite
Hardness: 7.0
Rose Quartz
Hardness: 7.0
Ruby
Hardness: 9.0
Sapphire
Hardness: 9.0
Smoky Quartz
Hardness: 7.0
Spessartine
Hardness: 7.0
Alexandrite
Hardness: 8.5
Almandine
Hardness: 7.0
Amazonite
Hardness: 6.0
Amber
Hardness: 2.0
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