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(mineralogy) prehnite
This beautiful prehnite is part of my mineral collection.
stonen
This stone building is an ancient ruin.
(mining) gangue
In this mine, work is being done to separate the gangue from the ore.
(mineralogy) fluorite
This beautiful fluorite is part of my mineral collection.
(mineralogy) aragonite
Aragonite is a type of calcium carbonate, and its crystal structure is distinctive.
(mineralogy) cassiterite
This rock contains cassiterite.
marriage with an age gap
We are in a marriage with an age gap, but our love is deep.
(set theory) symmetric difference
In set theory, the symmetric difference indicates the difference between two sets.
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DiQt（ディクト）
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