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Pegmatite

Pegmatite

www.alexandrite.net/chapters/glossary/pegmatite.html

Perovskite

Perovskite

www.alexandrite.net/chapters/glossary/perovskite.html

Phase

Phase

www.alexandrite.net/chapters/glossary/phase.html

Physical properties

Physical properties

www.alexandrite.net/chapters/glossary/physical-properties.html