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Albite

{110}, {010}, {111}, modifiedHunza, Pakistan

Arfvedsonite

Short prismatic [001]Imilchil, Midelt, Marokko

Beryl

Tabular {001}Pingwu, China

Calcite

{413}, {100}, {012}La Sambre quarry, Landelies, Belgium

Calcite

{413}, {100}, {012}, contact twin on {001}La Sambre quarry, Landelies, Belgium

Calcite

{012}, {100}La Sambre quarry, Landelies, Belgium

Calcite

Contact twin on {001}, triangular habit due to underdevelopment of prism facesLa Sambre quarry, Landelies, Belgium

Calcite

{413}, {100}, {012}, contact twin on {001}La Sambre quarry, Landelies, Belgium

Calcite

{413}, {081}, modified, contact twin on {001}La Sambre quarry, Landelies, Belgium

Calcite

{012}, {283}, contact twin on {001}La Sambre quarry, Landelies, Belgium

Calcite

{101}, {021}Tsumeb, Namibia

Calcite

Contact twin on {012}Dalnegorsk, Russia

Calcite

{2131}, {0112}Alberoda, Germany

Calcite

Contact twin on {1011}El Hammam, Marokko

Calcite

Contact twin on {0001}, contact plane {1010}Mexico

Calcite

Contact twin on {0001}, contact plane {1010}Mexico

Epidote

Contact twin on {100}Green Monster Mountain, Prince of Wales Island, Alaska, USA

Epidote

Pseudo-octahedralRas Koh Mountains, Kharan, Kharan District, Balochistan (Baluchistan), Pakistan

Epidote

Pseudo-octahedralRas Koh Mountains, Kharan, Kharan District, Balochistan (Baluchistan), Pakistan

Epidote

Pseudo-hexagonal tabletRas Koh Mountains, Kharan, Kharan District, Balochistan (Baluchistan), Pakistan

Fluorite

Penetration twin on [111]Weardale, England, UK

Hanksite

{110}, {113}, {001}Searles Lake, California, USA

Hanksite

{110}, {113}, {001}, {223}Searles Lake, California, USA

Hauyne

{110}, {100}In Den Dellen, Mendig, Eifel, Germany

Hematite

Tabular {001} twinned on {102}Tormiq, Haramosh Mountains, Skardu, Gilgit-Baltistan, Pakistan

Hematite

Tabular {001} twinned on {102}Tormiq, Haramosh Mountains, Skardu, Gilgit-Baltistan, Pakistan

Kaersutite

{010}, {110}, {011}, modifiedBoutaresse, Auvergne, France

Kaersutite

{011}, {010}, {110}, modifiedBoutaresse, Auvergne, France

Kaersutite

{110}, {010}, {011}, modifiedBoutaresse, Auvergne, France

Kaersutite

Contact twin on {100}Boutaresse, Auvergne, France

Kaersutite

{110}, {010}, {011}, modifiedBoutaresse, Auvergne, France

Kaersutite

Prismatic [001], with epitaxial augiteBoutaresse, Auvergne, France

Microcline

Manebach twinMalawi

Pyrite

{210} {100} {111}Huanzala, Peru

Quartz

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

Schorl

Prismatic, hemimorphicErongo, Namibia

Sphalerite

{111}, {111}, modifiedConstructed

Spinel

Modified octahedronBetroka, Anosy, Madagascar

Staurolite

Penetration twin on {231}Constructed

Vesuvianite

{101}, {001}Fushan Fe deposit, Xingtai Prefecture, Hebei Province, China

Vesuvianite

{101}, {001}, {112}Fushan Fe deposit, Xingtai Prefecture, Hebei Province, China

Vesuvianite

{101}, modifiedFushan Fe deposit, Xingtai Prefecture, Hebei Province, China

Wolframite

{100}, {010}, {102}, modifiedPanasquiera, Portugal

Zircon

{100}, {301}, {101}Norway