keigan
1. quartzite
Noun
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1. quartzite
1. Of chert; Cherty
1. With chert; In chert
1. It is not keigan.; It is not a keyan stone.
1. Keiwan desu;
1. If/when keiyan (siliceous rock); If it is siliceous rock
1. It is not keyakushi.; It is not a keyakushi stone.
1. Was shale.
1. Not shale.; Not a shale.
1. Was not shale.; Was not chert.