Cyclic twins

Cyclic twins: Repeated twining that tends to produce circular forms according to the same twin law but with the twin axis or twin planes, such as chrysoberyl or aragonite crystals having a pseudohexagonal symmetry.

Cabochon: Cabochon; m.alexandrite.net/chapters/glossary/cabochon.html
Carat: Carat; m.alexandrite.net/chapters/glossary/carat.html
Chatoyancy: Chatoyancy; m.alexandrite.net/chapters/glossary/chatoyancy.html
Chemical composition: Chemical composition; m.alexandrite.net/chapters/glossary/chemical-composition.html
Chromium: Chromium; m.alexandrite.net/chapters/glossary/chromium.html
Chrysoberyl: Chrysoberyl; m.alexandrite.net/chapters/glossary/chrysoberyl.html
Clarity grading: Clarity grading; m.alexandrite.net/chapters/glossary/clarity-grading.html
Color change: Color change; m.alexandrite.net/chapters/glossary/color-change.html
Corundum: Corundum; m.alexandrite.net/chapters/glossary/corundum.html
Crystal: Crystal; m.alexandrite.net/chapters/glossary/crystal.html
Crystal structure formation: Crystal structure formation; m.alexandrite.net/chapters/glossary/crystal-structure-formation.html
Cymophane: Cymophane; m.alexandrite.net/chapters/glossary/cymophane.html
Cymophane: Cymophane; m.alexandrite.net/chapters/glossary/cymophane.html
Czochralski technique: Czochralski technique; m.alexandrite.net/chapters/glossary/czochralski-technique.html

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Cyclic twins

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