Lake Superior, Keweenaw Co., Michigan, USA

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Calcite : CaCO₃
	Lake Superior, Keweenaw Co., Michigan, USA 2.4 x 0.9 x 0.7 cm (largest). A fine, 6-piece set of calcite scalenohedrons from a rare 1980s find in Lake Superior off of the famed Keweenaw Peninsula of Michigan. All of the crystals are water-clear, unusually flattened and have steep, modified terminations. All of the crystals are beautifully striated and all are pristine. Ex. Dick Jones ...
© Rob Lavinsky	Photo ID: 260150 View Count: 30
Chalcedony (Var: Agate) : SiO₂
	Lake Superior, Keweenaw Co., Michigan, USA Specimen size is 2cm X 1.5cm This is a lake superior agate tumble polished
	Photo ID: 182575 View Count: 102
Agate (Var: Lake Superior Agate) : SiO₂
	Manitou Island, Lake Superior, Keweenaw Co., Michigan, USA This fine agate measures 8.5 cm long and 5 cm across. It was discovered while diving off Manitou Island in Lake Superior.
© Paul T. Brandes	Photo ID: 158080 View Count: 458
Agate (Var: Lake Superior Agate) : SiO₂
	Lake Superior, Keweenaw Co., Michigan, USA A rounded Lake Superior Agate found on a beach in Keweenaw County, Michigan, The pebble measures about 4.5 cm across and was discovered in July, 2007.
© Paul T. Brandes	Photo ID: 158082 View Count: 303
Agate (Var: Lake Superior Agate) : SiO₂
	Manitou Island, Lake Superior, Keweenaw Co., Michigan, USA This fine agate measures 6.5 cm long and 4.5 cm across. It was discovered while diving off Manitou Island in Lake Superior.
© Paul T. Brandes	Photo ID: 224206 View Count: 109
Copper : Cu
	Lake Superior, Keweenaw Co., Michigan, USA A very sculptural copper, showing fine spinel-twinned crystals - an elegant Michigan copper! 2.3 x 1.6 x 1.6cm
© Rob Lavinsky	Photo ID: 49382 View Count: 156
Copper : Cu
	Lake Superior, Keweenaw Co., Michigan, USA 5.3 x 3.4 x 3.3 cm. A super-sharp, textbook-quality, 2.0 cm, copper tetrahexahedron very aesthetically upright on copper crystals, quartz and groundmass from Michigan’s famous Copper County. The copper has an outstanding patina. Ex. George Elling Collection and obviously an old-timer.
© Rob Lavinsky	Photo ID: 133810 View Count: 93
Copper : Cu
	Isle Royale National Park, Lake Superior, Keweenaw Co., Michigan, USA Sample size: 7,5 X 6,5 cm Collection and photo: Arliguie M
© Arliguie M	Photo ID: 137846 View Count: 84
Copper : Cu
	Lake Superior, Keweenaw Co., Michigan, USA 5.5 x 4.7 x 2.0 cm. SHARP, tetrahexahedral and CUBIC copper crystals with nice patina form this sculptural copper specimen from the famous Copper Country of Michigan. Cubic copper crystals are RARE from the Keweenaw and these are good ones! A CLASSIC, OLD-TIME and very fine piece. Ex L.L. Hubbard Collection #273 and Seaman Museum. His collection, ...
© Rob Lavinsky	Photo ID: 114246 View Count: 66
Copper : Cu
	Lake Superior, Keweenaw Co., Michigan, USA This excellent group of copper crystals is from the "Laker Pocket" vein located in 10 feet of water in Lake Superior. These are the crystals that were featured in the January/February 2009 issue of "Rocks & Minerals" magazine. This specimen measures 4 cm across.
© Paul T. Brandes	Photo ID: 250035 View Count: 29