Case 12

Copper in Calcite

Copper Falls mine Keweenaw County Michigan Excellent thumbnail with several calcite crystals that are filled with bright native copper. 2.5 x 1.3 x 2.0cm SOLD TM75-540

Datolite

Mesnard mine Houghton County Michigan Gorgeous specimen with beautiful color. 3.3 x 3.0 x 1.3cm SOLD TM21-1113

Copper Crystals

Phoenix mine Keweenaw County Michigan Outstanding miniature of arborescent copper crystals. Ex. A. E. Seaman specimen from one of the early Red Metal Retreat(1995) auctions. 4.7 x 2.3 x 2.1cm SOLD TM19-867

Silver/Copper

Phoenix mine Keweenaw County Michigan Very fine miniature with lots of silver on both sides and 3 sharp silver crystals on the one end. 4.0 x 2.2 x 1.1cm SOLD TM45-222

Datolite

Mandan Gravel Pit Keweenaw County Michigan Good size specimen from this odd locality. Rare to see this size with good color. Ex. Wayne Sukow collection. 6.7 x 5.1 x 1.9cm SOLD TM21-1114

Calcite/Copper

Adventure mine Ontonagon County Michigan Great display piece with a large calcite crystal surrounded by very attractive "sponge copper". Adularia & other calcite xls are also present. 9.0 x 6.5 x 5.3cm SOLD TM75-541

Copper Crystals

Laurium mine Houghton County Michigan Excellent crystallization on this cabinet size specimen that also has small silver crystals scattered on some of the copper crystals. The note that came with the specimen said it was collected in 1975, with only one hour spent at the mine site. Pretty good hour!! 10.8 x 4.4 x 3.2cm SOLD TM19-868

Datolite

Delaware mine Keweenaw County Michigan Beautiful color on this fine datolite. Comes with 3 other labels with prices from $250 to $420. Ex. Steve Behling collection. 6.8 x 3.8 x 1.7cm SOLD TM21-1115