|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Brazil > Quartz var. Smoky Quartz (Dauphiné-law twins)
|Quartz var. Smoky Quartz (Dauphiné-law twins)
|São Geraldo do Baixio, Minas Gerais, Brazil
|Lustrous transparent light-smoky quartz crystals with suture patterns on the prism faces indicating the quartz crystals are twinned following the Dauphiné Law of quartz twinning.
|For reference only
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