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Quartz

{101}, {011}

Quartz

{100}, {101}, {011}

Quartz

Left-handed Dauphiné twin (mimetic twin on [001])

Quartz

{100}, {101}, {011}, modified

Quartz

Right-handed Dauphiné twin (mimetic twin on [001])

Quartz

{101}, modified

Quartz

{100}, {101}, {011}, {511}

Quartz

Japanese twin of two flattened crystals

Quartz

Japan law twin (Contact twin on {112})

Quartz

{100}, {210}, {101}, modified

Quartz

{100}, {611}, {101}, modified

Quartz

Common habit, {100}, {101}, {011}

Quenselite

Tabular {010}, elongated [001]