Volcanic Glass
Obsidian
The Volcanic Glass
Hardness 5.5·Amorphous
Encyclopedia of Crystals & Minerals
Crystal Almanac
Scientific identification, geological formation stories, fake-spotting guides, and cultural traditions - for every stone that matters.
50 crystals and minerals documented
Feldspar Group
Labradorite
The Stone of Transformation
Hardness 6.5·Triclinic
Quartz Family
Amethyst
The Stone of Spiritual Wisdom
Hardness 7·Trigonal
Quartz Family
Citrine
The Merchant's Stone
Hardness 7·Trigonal
Halide Group
Fluorite
The Genius Stone
Hardness 4·Cubic
Sulfide Group
Pyrite
The Fool's Gold
Hardness 6.5·Cubic
Carbonate Group
Malachite
The Stone of Transformation
Hardness 3.5·Monoclinic
Phosphate Group
Turquoise
The Sky Stone
Hardness 6·Triclinic
Rock (Lazurite-based)
Lapis Lazuli
The Stone of the Heavens
Hardness 5.5·Cubic (lazurite component)
Feldspar Group
Moonstone
The Traveler's Stone
Hardness 6·Monoclinic
Quartz Family
Rose Quartz
The Stone of Unconditional Love
Hardness 7·Trigonal
Quartz Family
Tiger's Eye
The Stone of Courage
Hardness 7·Trigonal (pseudomorphic)
Sulfate Group
Selenite
The Liquid Light
Hardness 2·Monoclinic
Borosilicate Group
Tourmaline
The Rainbow Stone
Hardness 7.5·Trigonal
Garnet Group
Garnet
The Warrior's Stone
Hardness 7·Cubic
Beryl Family
Aquamarine
The Sailor's Gem
Hardness 7.5·Hexagonal
Quartz Family (Chalcedony)
Carnelian
The Singer's Stone
Hardness 7·Trigonal (microcrystalline)
Mineraloid (Hydrated Silica)
Opal
The Eye Stone
Hardness 5.5·Amorphous
Two Minerals: Jadeite and Nephrite
Jade
The Dream Stone
Hardness 6.5·Monoclinic
Inosilicate Group
Rhodonite
The Rescue Stone
Hardness 6·Triclinic
Feldspathoid Group
Sodalite
The Poet's Stone
Hardness 5.5·Cubic
Quartz Family
Aventurine
The Stone of Opportunity
Hardness 7·Trigonal (microcrystalline)
Quartz Family (Chalcedony)
Jasper
The Supreme Nurturer
Hardness 7·Trigonal (microcrystalline)
Quartz Family (Chalcedony)
Agate
The Stabilizer
Hardness 7·Trigonal (microcrystalline)
Quartz Family
Clear Quartz
The Master Healer
Hardness 7·Trigonal
Oxide Group
Hematite
The Blood Stone
Hardness 5.5·Trigonal
Borosilicate Group
Black Tourmaline
The Shield Stone
Hardness 7·Trigonal
Quartz Family
Smoky Quartz
The Grounding Stone
Hardness 7·Trigonal
Feldspar Group
Amazonite
The Hope Stone
Hardness 6·Triclinic
Nesosilicate Group
Kyanite
The Blade of Balance
Hardness 4.5·Triclinic
Phyllosilicate Group
Chrysocolla
The Teaching Stone
Hardness 2.5·Monoclinic (poorly crystalline)
Borate Group
Howlite
The Calming Stone
Hardness 3.5·Monoclinic
Quartz Family (Chalcedony)
Bloodstone
The Martyr's Stone
Hardness 7·Trigonal (microcrystalline)
Mica Group
Lepidolite
The Peace Stone
Hardness 2.5·Monoclinic
Carbonate Group
Azurite
The Stone of Heaven
Hardness 3.5·Monoclinic
Tektite (Impact Glass)
Moldavite
The Stone from the Stars
Hardness 5.5·Amorphous
Pectolite variety
Larimar
The Dolphin Stone
Hardness 5·Triclinic
Olivine Group
Peridot
The Evening Emerald
Hardness 6.5·Orthorhombic
Chrysoberyl Family
Alexandrite
The Chameleon Gem
Hardness 8.5·Orthorhombic
Zoisite Family
Tanzanite
The Generation Stone
Hardness 6.5·Orthorhombic
Spodumene variety
Kunzite
The Evening Stone
Hardness 6.5·Monoclinic
Quartz Family (Chalcedony)
Chrysoprase
The Stone of Venus
Hardness 7·Trigonal (microcrystalline)
Silicate (Charoite Group)
Charoite
The Stone of Transformation
Hardness 5·Monoclinic
Quartz Family
Ametrine
The Two-Toned Gem
Hardness 7·Trigonal
Mineraloid (Carbon-rich Rock)
Shungite
The Carbon Shield
Hardness 3.5·Amorphous
Phyllosilicate Group
Prehnite
The Healer's Stone
Hardness 6.5·Orthorhombic
Cyclosilicate Group
Sugilite
The Healer's Stone of the Violet Ray
Hardness 6·Hexagonal
Clinochlore variety
Seraphinite
The Angel Stone
Hardness 2.5·Monoclinic
Quartz Family (Chalcedony, brecciated)
Pietersite
The Tempest Stone
Hardness 7·Trigonal (microcrystalline)
Altered Granite
Unakite
The Stone of Vision
Hardness 6.5·N/A (rock, not single mineral)