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Mineral Specimens with Calcite
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13.0 x 12.5 x 5.5 cm. A CLASSIC, OLD-TIME and SHOWY English CABINET plate RICHLY covered with lustrous, pink, hematite-tinted calcite scalenohedrons in a jackstraw pattern from Cumbria. The largest calcite is 3.1 cm. This is certainly one of the most desirable and uncommon in good specimen calcite varietals from Egremont. The label states that this piece is from an old collection, 1890. Ex. George Elling Collection.
10.9 x 6.0 x 3.3 cm. Two fine, golden crystals of calcite on a thin shard of matrix, from the Sweetwater Mine. This pretty specimen was mined in mid-1992. It is in pristine condition, with the terminations free of damage, and no contacts on the crystals. The larger crystal measures just under 11 cm tip-to-tip. Unusually aesthetic! From the noted Midwest minerals collection of George Feist.
7.3 x 5.4 x 4.6 cm. These strange and very distinctive calcites were collected in Mexico in the 1940s. Another find was made about 2 years ago, but this is from the old finds. On this specimen, you can clearly see a central twin, enfolded by the dark outer twin.
5.7 x 4.9 x 4.4 cm. This big, impressive Dalnegorsk calcite was very hard to photograph. In person, it is quite gemmy, with lustrous faces, and hexagonal form with a good termination on top. There are a couple of very minor dings around the edge. It is actually a slight SCEPTRE - you can see a ridge running all the way around with the bottom slightly smaller than the top.
8.0 x 3.5 x 2.1 cm. A very uncommon specimen of chalcotrichite as red INCLUSIONS in crystals of calcite - with the added bonus of a finger of crystallized copper on the specimen to make it a wonderful copper-mineral combo specimen. What you mostly see from this mine are specimens of copper alone. This rare combo piece came out of the collection of noted African mineral collector Marshall Sussman. It is a superb association piece and something you do not see from anywhere else I can think of but old Bisbee.
7.5 x 6.0 x 3.9 cm. Lustrous, tan heulandite crystals nicely placed on basalt matrix covered with quartz and calcite crystals. Ex. Cilen and George Elling Collections.
8.0 x 5.7 x 5.2 cm. An excellent and showy, two-sided, 3-dimensional, mounded cluster of highly lustrous, flesh-colored calcite rhombs on massive white calcite matrix from Tsumeb. Ex. George Elling Collection.
11.5 x 5.8 x 5.3 cm. A showy and excellent Tsumeb CABINET specimen of lustrous, colorless nail-head calcite crystals to 1.7 cm richly and attractively scattered on matrix accented with green mottramite. More intricate the more you look at it; this is a classic style for Tsumeb!
13.7 x 7.2 x 6.9 cm. An old York, Pennsylvania calcite specimen, extremely rich and sizeable, covered with light amber crystals to 3.3 cm. The crystals have very good luster, and though this is a large specimen, there is very minor damage. Ex. Feist Collection.
7.7 x 3.4 x 2.1 cm. An elegant, translucent, light golden-yellow crystal of calcite from the Sweetwater. It is terminated on the top end, with natural contact (from the pocket wall) at the other end. There is a small amount of dolomite matrix at the bottom back.
6 x 4.1 x 2.5 cm. STUNNING, glassy-gemmy crystals of dioptase, of the TOP Tsumeb color, isolated on a bed of small crystals of stark white contrasting calcite. The largest dioptase crystal measures 1.2 cm.
5.1 x 3.7 x 2.7 cm. A relatively low-manganese-bearing member of the calcite-kutnahorite-rhodochrosite series found here, this subtle pink color is very attractive. The manganese content is not enough to grade into kutnahorite, so we label this as a manganoan calcite. Ex. Charlie Key Collection.
5.8 x 6.0 x 3.2 cm. Incredibly intense lemon-yellow microcrystals of ettringite liberally draping a crystallized calcite matrix. Overall, just a beautiful piece! Ex. Charlie Key Collection.
2.6 x 2.2 x 1.1 cm. A killer thumbnail with a GEM calcite rhombohedron perched against clusters of splaying kutnahorite xls! It is not quite at a micro level, but almost, pristine. Certainly good enough to the naked eye to win a thumb prize for beauty. Ex. Charlie Key Collection.
2.2 x 1.3 x 1.0 cm. Brilliant fiery-orange calcites, made so by microscopic inclusions of the cuprite varietal chalcotrichite. Small piece, but a splashy one nonetheless, and a choice and unusual piece for any thumbnail collection. Ex. Charlie Key Collection.
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Rob Lavinsky, rob@irocks.com
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