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(mineralogy) realgar
Realgar is a beautiful red mineral, but it is toxic.
(mineralogy) aragonite
Aragonite is a type of calcium carbonate, and its crystal structure is distinctive.
(mineralogy) cassiterite
This rock contains cassiterite.
(mineralogy) serpentine
This beautiful serpentine necklace is a gift from my mother.
(mineralogy) alunite
This rock is made of alunite.
(mineralogy) chlorite (mineral)
This rock contains chlorite.
(mineralogy) sudoite
Sudoite is a green mineral that is mainly found in Japan.
(mineralogy) prehnite
This beautiful prehnite is part of my mineral collection.
stonen
This stone building is an ancient ruin.
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