Crystals That Start With C
There are 27 crystals, rocks and gemstones in Gemdle that start with the letter C — each with a specimen photo, its Mohs hardness and a quick note on how to spot it. Tap any stone for the full identification guide.
Notable crystals that start with C
- Copper — Orange, metallic lustre, Mohs 2.5–3.
- Clear Quartz — Clear, vitreous – waxy to dull when massive lustre, Mohs 7 – lower in impure varieties (defining mineral).
- Cinnabar — Red, adamantine to dull lustre, Mohs 2.0–2.5.
- Corundum — Red, adamantine to vitreous lustre, Mohs 9 (defining mineral).
- Calcite — Clear, vitreous to pearly on cleavage surfaces lustre, Mohs 3 (defining mineral).
- Chalcedony — Blue, waxy, vitreous, dull, greasy, silky lustre, Mohs 6–7.
- Carnelian — Orange, waxy to resinous lustre, Mohs 6.5–7.0.
- Chert — Gray.
All 27 stones beginning with C
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Copper
Mohs 2.5–3
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Clear Quartz
Mohs 7 – lower in impure varieties (defining mineral)
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Cinnabar
Mohs 2.0–2.5
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Corundum
Mohs 9 (defining mineral)
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Calcite
Mohs 3 (defining mineral)
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Chalcedony
Mohs 6–7
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Carnelian
Mohs 6.5–7.0
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Chert
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Chrysoberyl
Mohs 8.5
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Chalcopyrite
Mohs 3.5–4
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Chrysotile
Mohs 2.5–3
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Conglomerate
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Chromite
Mohs 5.5
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Cassiterite
Mohs 6–7
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Celestine
Mohs 3.0–3.5
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Charoite
Mohs 5 - 6
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Chrysocolla
Mohs 2.5–3.5 (7 for chrysocolla chalcedony, high-silica content)
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Chrysoprase
Mohs 6.0–7.0
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Crocoite
Mohs 2.5–3
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Cuprite
Mohs 3.5 to 4
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Citrine
Mohs 7
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Cerussite
Mohs 3 to 3.5
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Cobaltite
Mohs 5.5
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Cavansite
Mohs 3 - 4
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Colemanite
Mohs 4.5
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Chabazite
Mohs 4-5
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Cancrinite
Mohs 5–6
Frequently asked questions
How many crystals start with the letter C?
Gemdle lists 27 crystals, rocks and gemstones beginning with C, including Copper, Clear Quartz, Cinnabar.
What is a well-known crystal that starts with C?
Copper is one of the most searched-for stones beginning with C. Copper is a chemical element; it has symbol Cu and atomic number 29.