From San Eugenio, Artigas Dept., Uruguay   Heres a large museum quality cluster of several stalactitic formations of scintillating gem amethyst crystals with 2 isolated golden calcite crystals in sharp scalenohedral from with gem translucent core. The stalactites are completely intact with glassy luster crystal.    25 lbs, 17 x 17...

Lustrous transparent powder blue thin pyramidal crystals in parallel formations on matrix inter grown with several isolated crystals of calcite in fully terminated scalenohedral formation.   9.8 lbs, 10.5 x 8.5 x 4 inches

From Elmwood Mine, Carthage, Smith County, TennesseeLustrous transparent light golden calcite crystal on matrix. Large double terminated scalenohedral twinned on the C-axis with well defined complex re-entrant faces.634.6 g, 6'' x 2.75'' x 2''

From Jalgaon, Maharashtra, India Lustrous transparent golden-yellow calcite crystals on tan-colored limestone. The calcite crystals are scalenohedral form with second-order modifications near the crystal terminations.  91.4 grams, 2.75 X 1.5 X 2.75 inches

from Jalgaon,  Maharashtra, India Large vug lined with transparent to translucent lustrous apophyllite crystals intergrown with pink stilbite accented by an isolated twinned golden calcite. The calcite show sharp rhombic form with a penetrating twin, several faces are coated with a sparkling coating of druzy quartz.   13 lbs, 11...

from Jalgaon,  Maharashtra, India   Large twinned crystals of transparent golden calcite crystals atop a matrix lined with gem clear apophyllite crystals intergrown with pink stilbite ae. The calcite show sharp rhombic form with a penetrating twinned crystals, fully terminated with no damage.   1.3 lbs , 4 x 3.5...

From Indonesia Lustrous vibrant orange-yellow showy, sharp "Porcupine" calcite cluster. The calcites are perfectly terminated and damage free.   10.3 lbs, 13 x 5 x 6 inches

Elongated intergrown 5'' transparent calcite crystals with scintillating drusy quartz coating over the crystal faces all on large plate lustrous amethyst. There are several isolated scalenohedral crystals are quartz crystal cast.   15.5 lbs, 9 x 11.5 x 5 inches

from Elmwood Mine, Carthage, Smith County, Tennessee   A superb little specimen of golden transparent twinned doubly-terminated calcites on matrix. The calcites are perfectly terminated and damage free.   20.4 grams, 1 x 1 x 1.25 inches

From Nasik District, Maharashtra, India Lustrous Large transparent yellow rhombohedral calcite crystal with textured striated crystal faces. Most of the calcite crystal is flawless. 163 grams, 2 X 1.5 X 1.5 inches

From San Eugenio, Artigas Dept., Uruguay   Large 6'' scalenohedral transparent calcite sceptor crystal on matrix  with lustrous translucent grape purple amethyst crystals.   5 lbs, 9'' x 7'' x 7''

From San Eugenio, Artigas Dept., Uruguay Large 6'' sharp scalenohedral crystal of Calcite centered on matrix of grape purple translucent to transparent top-quality Uruguayan Amethyst. This piece is in supreme condition and is a top collectable specimen.   8 lbs, 8 x 3 x 8 inches

From San Eugenio, Artigas Dept., Uruguay   Large 7'' x 3.5" scalenohedral crystal of calcite on amethyst matrix accented by isolated cluster of colorless quartz. The calcite crystal shows fully terminated faces composed of small micro etched faces, with a rich transparent golden yellow core. There an very light micro...

From San Eugenio, Artigas Dept., Uruguay   Large 7'' x 3" scalenohedral crystal of calcite on amethyst matrix accented by isolated cluster of colorless quartz. The calcite crystal shows fully terminated faces composed of small micro etched faces, with a rich transparent golden yellow core. There an very light micro...

From San Eugenio, Artigas Dept., Uruguay Large 6'' sharp scalenohedral crystal of Calcite centered on matrix of  purple translucent to transparent top-quality Uruguayan Amethyst.   7.5 lbs, 9 x 7 x 7 inches

From San Eugenio, Artigas Dept., Uruguay Unusual 7'' elongated rhombic calcite crystal with modified terminations on gem amethyst crystal matrix. The calcite is perfectly terminated with an unusual tapering at the terminations into a secondary growth, coated with a micro crystal giving it the sparkle affect.   4 lbs, 8...

From San Eugenio, Artigas Dept., Uruguay   Museum quality specimen gem-quality 10" scalenohedral crystal of golden Calcite centered on matrix lined with grape purple translucent to transparent top-quality Uruguayan Amethyst. The calcite has sharp scalenohedral with small isolated amethyst cluster drapped along the calcite crystal faces.  This piece is in pristine condition and is...

from Mina Ojuela, Mapimi, Durango, Mexico   Excellent specimen of a transparent calcite overgrowth on electric green conichalcite variety barthite crystals in spherical botryoidal aggregates on gossan matrix. There are 2 isolated clusters of tabular calcite crystals. The calcite overgrown shows well defined scalenohedral faces.   417 grams, 3.75 x 2...

From Aurangabad, Maharashtra, India Large 5.75 inch pale-pink pseudomorph crystal of gem transparent calcite crystals coated with sparkling quartz micro crystals. In pristine condition, no damage.   242.7 grams, 2.75 x 1.5 x 5.75 inches

From Chenzhou Prefecture, Hunan Province, China Plumose translucent pink calcite. The pink color of the calcite is caused by manganese impurities and these are frequently labeled as manganocalcite, an obsolete mineral name.   7.5 lbs, 7 x 4 x 8 inches

From Jalgaon,  Maharashtra, India   Large cabinet specimen of rich golden yellow calcite crystal cluster partially covered in lustrous gem apophyllite crystals. The calcite has sharp rhombohedral form with lustrous faces showing sub parallel growth.   7.5 lbs, 9 x 4 x 7 inches

From Edong Mining District, Daye, Hubei, China   Large cluster of scalenohedral calcite with a secondary coating of lustrous iridescent metallic chalcopyrite crystals on the surfaces. Bright and lively specimen with a scintillating surface.   3.20 lbs, 6.5'' x 4'' x 4.75''

From Yaogangxian Mine, Nanling Mountains, Hunan Province, China   Large specimen of pale-yellow scalenohedral calcite on a bed of micro calcite crystals with transparent mint green fluorite with purple phantoms. The fluorites are cubic with modified terminations. Minor contact along the bottom of the specimen.   2.70 lbs, 7'' x...

A massive, 52 lb geode with large rhombic Calcite crystals beside a pseudomorphic quartz after Calcite crystals with pink Heulandite crystals in a wheat sheave aggregate.  Additionally, there are lustrous pink Stilbite crystals on gradient powder-blue to white-druzy Chalcedony matrix.   52 lbs, 10.5 x 14 x 10 inches

Large aesthetic formation of sharp, lustrous, translucent, white/colorless highly compressed rhombohedral calcite crystals in a stacking formation on calcite matrix with marcasite inclusions outlining the termination of the crystal.   3.4 lbs, 8 x 8 x 8 inches

Dachang Sn-polymetallic ore field, Nandan Co., Hechi Prefecture, Guangxi Zhuang Autonomous Region, ChinaLarge unusual rhombic crystal of translucent calcite with striations outlining the termination coated with a powdering of sparkly microcrystals of pyrite. The calcite faces are highly lustrous.   6 lbs, 7 x 3 x 4.5 inches

Dachang Sn-polymetallic ore field, Nandan Co., Hechi Prefecture, Guangxi Zhuang Autonomous Region, ChinaLarge unusual rhombic crystal of translucent calcite with striations outlining the termination coated with a powdering of sparkly microcrystals of pyrite. The calcite faces are highly lustrous.   2.5 lbs, 5.5 x 2.5 x 5 inches

From Aurangabad, Maharashtra, India   Massive complex cluster of fully crystallized green heulandite in rosette-shaped rounded aggregates. The green coloration is due to microscopic celadonite inclusions.   2.5 lbs, 8 x 4 x 6 inches

From Aurangabad, Maharashtra, India   Massive complex cluster of fully crystallized green heulandite in rosette-shaped rounded aggregates. The green coloration is due to microscopic celadonite inclusions.  4.6 lbs, 9 x 3.75 x 8 inches

From Aurangabad, Maharashtra, India Massive complex cluster of fully crystallized green heulandite in rosette-shaped rounded aggregates. The green coloration is due to microscopic celadonite inclusions. 7.4 lbs, 12 x 7.5 x 3 inches

From Alimon Mine, Huaron, Cerro de Pasco, Peru   Large formation of metallic chalcopyrite crystals overgrown on lustrous jet black sphalerite accented by small flat rhombic calcite crystals and yellow metallic pyrite crystals.   4 lbs, 5.5 x 2 x 5 inches

From Alimon Mine, Huaron, Cerro de Pasco, Peru Large formation of metallic chalcopyrite crystals overgrown on lustrous jet black sphalerite accented by small flat rhombic calcite crystals and yellow metallic pyrite crystals.   1.7 lbs, 6.75 x 5.75 x 2.75 inches

Lustrous rounded cluster of vibrant pink rhombohedral Cobaltoan Calcite crystals. The calcite is translucent to transparent along the edge.  The pink color is due to cobalt impurities.   217.6 grams, 2.75 x 2.5 x 1.25 inches

Lustrous rounded cluster of vibrant pink rhombohedral Cobaltoan Calcite crystals. The calcite is translucent to transparent along the edge.  The pink color is due to cobalt impurities.   384 grams, 4.15 x 2.75 x 1.75 inches

Lustrous rounded cluster of vibrant pink rhombohedral Cobaltoan Calcite crystals. The calcite is translucent to transparent along the edge.  The pink color is due to cobalt impurities.   239 grams, 3.25 x 2.25 x 1.5 inches

Lustrous rounded cluster of vibrant pink rhombohedral Cobaltoan Calcite crystals. The calcite is translucent to transparent along the edge.  The pink color is due to cobalt impurities.   220 grams, 2.25 x 2 x 2.25 inches

From Mashamba West , Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaire)Complex cluster of lustrous pink translucent flattened rhombohedral cobalt-rich Calcite crystals on matrix. Has bright intense color with scintillating luster. These are from an old stock mined from the 1970s or 1980s and very rarely available with this...

From Mashamba West , Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaire) It is no surprise that minerals predominantely display colors involving one of the "earth tones" - orange, brown, black, tan, etc. Here a fairly normal, golden hued Calcite matrix is thinly over-coated by a second generation...

From Mashamba West , Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaire) It is no surprise that minerals predominantely display colors involving one of the "earth tones" - orange, brown, black, tan, etc. Here a fairly normal, golden hued Calcite matrix is thinly over-coated by a second generation...

From Mashamba West , Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaire) It is no surprise that minerals predominantely display colors involving one of the "earth tones" - orange, brown, black, tan, etc. Here a fairly normal, golden hued Calcite matrix is thinly over-coated by a second generation...