Mineral Group · 73 minerals
Quartz & Chalcedony
Minerals
73
Hardness
5-7 Mohs
Crystal Systems
Trigonal, Amorphous, Non-crystalline
What Defines the Quartz Group
The most abundant mineral family on Earth's surface. Includes macrocrystalline quartz (amethyst, citrine, smoky quartz) and microcrystalline chalcedony (agate, jasper, carnelian). All share the formula SiO₂ but form under different conditions, producing an enormous variety of colors and patterns.
Minerals in This Group
Agate
The Stabilizer
Amethyst
The Stone of Spiritual Wisdom
Ametrine
The Two-Toned Gem
Aqua Aura Quartz
The Gold-Bonded Crystal
Auralite 23
The Billion-Year Crystal
Aventurine
The Stone of Opportunity
Black Onyx
The Stone of Strength
Bloodstone
The Martyr's Stone
Blue Chalcedony
The Speaker's Stone
Blue Lace Agate
The Communication Stone
Botswana Agate
The Sunset Stone
Boulder Opal
Australia's Ironstone Canvas
Brandberg Amethyst
Namibia three-in-one crystal
Carnelian
The Singer's Stone
Cathedral Quartz
Stacked, stepped quartz spires
Chalcedony
The Mother of Agates
Chevron Amethyst
The Banded Dreamer
Chrysoprase
The Stone of Venus
Citrine
The Merchant's Stone
Clear Quartz
The Master Healer
Crazy Lace Agate
The Laughter Stone
Dendritic Agate
The Stone of Plentitude
Elestial Quartz
The Crystal of a Thousand Faces
Enhydro Quartz
The Water Bearer
Faden Quartz
The Crystal That Heals Itself
Fenster Quartz
Window quartz with etch pits
Fire Agate
The Flame Within
Fire Opal
The Aztec Sun Stone
Fire Quartz
Quartz Captured in Iron Flame
Flower Agate
The Blooming Stone
Girasol Quartz
The Misty Glow Stone
Golden Healer Quartz
The Solar Catalyst
Grape Agate
The Dream Cluster
Harlequin Quartz
The Sparkling Jester Stone
Hawk's Eye
The Stone of Vision
Hematoid Quartz
The Fire Crystal
Herkimer Diamond
The Attunement Stone
Jasper
The Supreme Nurturer
Lemurian Quartz
The Seed Crystal
Leopardskin Jasper
The Spotted Totem Stone
Lithium Quartz
The Balancing Crystal
Lodolite
The Garden Quartz
Merlinite
The Wizard Stone
Mookaite
The Australian Sunset Stone
Moss Agate
The Gardener's Stone
Mtorolite
Chrome chalcedony, Great Dyke
Ocean Jasper
The Orbicular Stone
Opal
The Eye Stone
Phantom Quartz
The Ghost Crystal
Picture Jasper
Nature's Landscape Painter
Pietersite
The Tempest Stone
Pink Amethyst
The Patagonian Rose
Pink Opal
The Stone of Gentle Love
Polychrome Jasper
The Desert Sunset Stone
Poppy Jasper
Orbicular flower-pattern jasper
Prasiolite
The Green Amethyst
Quantum Quattro
Namibia four-phase copper stone
Red Jasper
The Supreme Nurturer
Rose Quartz
The Stone of Unconditional Love
Rutilated Quartz
Venus Hair Stone
Sardonyx
The Legionnaire's Stone
Shiva Lingam
The Sacred River Stone
Smoky Quartz
The Grounding Stone
Spirit Quartz
The Fairy Quartz
Star Rose Quartz
The Star of the Heart
Strawberry Quartz
The Stone of Universal Love
Super Seven
The Sacred Seven
Tangerine Quartz
The Sun-Kissed Crystal
Tanzan Aura Quartz
The Indigo-Veiled Crystal
Tibetan Quartz
The Roof of the World Crystal
Tiger's Eye
The Stone of Courage
Tree Agate
The Stone of Plenitude
Vera Cruz Amethyst
Slender Las Vigas amethyst