#72973, Calcite (interpenetrant twins), Sokolovskiy-Sarbaiskiy Mine, Kazakhstan (m) $150

#77218, Rutile (twinned crystals), Graves Mountain, Georgia (m) $325

#78625, Quartz with green inclusions, Teofilo Otoni, Brazil (m) $28

#77189, Galena with complex crystallization patterns, Brushy Creek Mine, Missouri (m) $165

#75045, Cerussite (sixling-twinned crystals) on Tennantite, Tsumeb Mine, 3rd Oxide Zone, Namibia (t) $165

#75733, Sphalerite (Spinel Law twinned crystals), France Stone Co. Quarry, 4.8 km east of Logansport, Indiana (m) $225

#71658, Quartz var. Smoky Quartz (Dauphiné Law Twinned), Moat Mountain, New Hampshire (m) $55

#78414, Quartz var. Amethyst over Milky Quartz, Deer Hill, Maine (c) $175

#75639, Rutile, Graves Mountain, Georgia (t) $115

#77575, Calcite (twinned crystals), Millington Quarry, New Jersey (t) $25

#75214, Malachite (concentric-growth malachite polished slice), Kolwezi District, Democratic Republic of the Congo (c) $215

#78459, Calcite with sulfide inclusions, Baia Sprie, Romania (t) $12

#78680, Quartz var. Smoky-Amethyst Scepter, Crystal Park, Montana (m) $165

#75231, Bournonite (doubly terminated complexly twinned crystals), Yaogangxian Mine, China (m) $295

#73754, Copper (naturally crystallized Spinel-Law twinned native copper crystals), Itauz Mine, Kazakhstan (t) $42

#78632, Quartz var. Smoky Quartz Dauphiné Law Twin, Lake George District, Colorado (m) $35

#78716, Fluorite (zoned crystals), Mina las Cocineras, Santa Eulalia District, Mexico (c) $325

#78894, Pyrope-Spessartine (color change garnet), Kenya (t) $20

#78679, Quartz var. Smoky-Amethyst Scepter, Crystal Park, Montana (m) $125

#78765, Quartz var. Smoky-Amethyst Scepter with Hematite inclusions, Chibukul Mine, Zimbabwe (m) $250

#78898, Sodalite var. Hackmanite in marble, Kiran, Kokscha Valley, Afghanistan (c) $175

#78751, Quartz var. Hourglass Amethyst, Adrar Tirecht Bou Oudi, Morocco (t) $375

#75233, Cerussite twinned crystals with Hydrocerussite coating plus minor Calcite, Tsumeb Mine, Lead Pocket, Namibia (m) $400

#72969, Topaz (with unusual healed fracture), Dassu, Braldu Valley, Pakistan (m) $400

#75287, Calcite (butterfly-twinned crystals) with Stibnite inclusions, Xikuangshan Mine, China (c) $450

#75720, Calcite (twinned crystals), Roosevelt Avenue Quarry (York Stone Quarry), Pennsylvania (lc) $295

#72344, Fluorapophyllite-(K) (formerly known as Apophyllite) and Stilbite over Thomsonite, Rahuri, Nagar District, India (m) $400

#78719, Calcite (twinned crystals), Elmwood Mine, Tennessee (c) $750

#77700, Cerussite (twinned crystals), Tsumeb Mine, Namibia (m) $1950

#78764, Quartz var. Smoky-Amethyst Scepter, Chibukul Mine, Zimbabwe (m) $625

#78664, Cerussite (reticulated), Taouz, Er Rachidia, Morocco (c) $400

#78761, Chrysoberyl (drill bit-twinned crystals), Ambatomanoina, Madagascar (t) $1500

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