Back to Top
of Page
Rocks and Minerals. Rock, Mineral and Crystal Specimens.
Mineral Dealer specializing in cabinet size fine minerals
Click Here to Return to Home Page
Mixed Minerals
Rocks and Minerals. Mineral, Rock and Crystal Dealer. Check out our high
quality selection.
Ordering Information
Privacy Statement
Gregory Crenko  Collection
Edward David
Green Fluorite Crystals on Quartz
Guanshang Mine, Guangze Co., Nanping Prefecture, Fujian Province, China
18 x 11.5 x 8 cm
Beautiful, gemmy, light green Fluorite crystals with complex, stepped surfaces on a matrix of fine Quartz.
Malachite Crystals on Matrix
Star of the Congo Mine, Lumbashi, Katanga, Democratic Republic of Congo
10 x 9 x 5 cm
Gorgeous formation of light green, botryoidal Malachite on matrix.
Sphalerite with Calcite
Stari Trg Mine, Trepca Complex, Near Mitrovica, Kosovoska Municipality, Kosovo
9 x 5 x 4 cm
Cluster of jet black, sharp, complex crystals of Sphalerite with an upper trim of Calcite. Even better in person.
Wulfenite Crystals on Matrix
Xinjiam, Henan Province, China
11 x 8.5 x 5 cm
A very nice specimen from the recent find of Wulfenite in China. Numerous blades of lustrous, orange Wulfenite with very few damaged crystals.
Siderite Crystal Cluster with Calcite
Prinzipal MIne, Herja Complex, Baia Mare, Maramures, Romania
9 x 8 x 4 cm
Super specimen of mustard colored, curved rhombohedrons of Siderite that are flattened to appear bladed, with partial coating of white Calcite.
Epidote Crystals on Andradite
Canta, Canta Province, Lima, Peru
6.5 x 4.5 x 3 cm
Fine specimen of dark pistachio green, lustrous, prismatic Epidote crystals (to 3x0.5 cm) on Andradite.
Hematinic Quartz with Calcite
Jiangxi Province, China
14.5 x 12 x 5.5 cm
Beautiful white Calcite crystals, with secondary growth of small Calcite crystals, on a base of Hematinic Quartz.
Cuprian Adamite on Limonite
Level 5, Mina Ojuela, Mapimi, Durango, Mexico
5.5 x 4.5 x 4.5 cm
Ex-Betty Kalaskie Collection
Lustrous Cuprian adamite crystals on Limonite.
#JAN 133
#JAN 134
#JAN 135
#JAN 136
#JAN 137
#JAN 138
#JAN 139
#JAN 140
#JAN 141
#JAN 142
#JAN 143
#JAN 144
#JAN 145
#JAN 146
#JAN 147
#JAN 148
#JAN 149
#JAN 150
#JAN 151
#JAN 152
#JAN 153
#JAN 154
#JAN 155
#JAN 156
#JAN 157
#JAN 158
#JAN 159
#JAN 160
#JAN 161
#JAN 162
#JAN 163
Anhydrite ps. after Quartz with Calcite
Rio Grande do Sul, Irai, Brazil
11 x 7 x 6.5 cm
Fluorite Crystals on Matrix
Mina La Viesca, La Colada, Pola se Siero, Asturias, Spain
14 x 11 x 7 cm
Ex-Jorge Diaz Asenjo Collection
Gypsum var. Selenite
Red River Floodway, Winnipeg, Manitoba, Canada
8 x 5 x 4.5 cm
Green Barite Crystal Cluster
Daye, Hubei, China
12.5 x 9 x 3.5 cm
Fluorite Crystal Cluster with Quartz
Yaogangxian Mine, Hunan Province, China
8 x 6 x 3 cm
Barite Crystal Cluster on Matrix
Cerro Warihuyn, Miraflores, Huamalies Province, Huanuco Department, Peru
14.5 x 11 x 2.5 cm
Quartz var. Amethyst Crystals on Matrix
Las Vigas de Ramirez, Veracruz, Mexico
14.5 x 12.5 x4 cm
Hemimorphite Crystals in Shallow Vug
Ojuela Mine, Mapimi, Durango, Mexico
8 x 5.5 x 1.5 cm
Tetrahedrite, Pyrite, Galena & Quartz
Casapalca Mine, Casapalca, Huarochiri Province, Lima Department, Peru
6.5 x4.5 x 3 cm
Ex-Jorge Diaz Asenjo Collection
Multi-Colored Chalcedony Stalagmite
Khadakvani, Madhya Pradesh, India
12.5 x 9 x 6 cm
Calcite Crystal Cluster
Yangshuo County, Guilin City, Guangxi Province, China
13.5 x 5.5 x 5.5 cm
Calcite Crystals on Sphalerite
Elmwood Mine, Carthage, Central Tennessee Ba-F-Pb-Zn District,
Smith County, Tennessee, USA
16 x 14 x 11 cm
Calcite Crystals with Marcasite & Fluorite on Matrix
Irving Materials Quarry, Anderson, Madison County, Indiana, USA
10.4 x 7.7 x 5 cm
Ex-Dawson Calcite Collection
Calcite Crystals on Matrix
El Hamman Mine, Meknes, Morocco
14 x 10.5 x 6 cm
Stilbite Crystals on Chalcedony in Vug
Jalgaon, Maharashtra, India
15.5 x 8 x 3.5 cm
Pyrite Crystal Cluster with Quartz
Huanzala Mine, Huallanca, Huallanca District, Bolognesi Province, Ancash Department, Peru
10 x 9 x 3 cm
Pyrite Crystals on Mari
Ampliación a Victoria Mine, Navajún, La Rioja, Spain
15 x 9 x 8 cm
Mari or marlstone is a calcium carbonate or lime-rich mud or mudstone, which contains variable amounts of clays and silt. The dominant carbonate mineral in most marls is calcite, but other carbonate minerals such as aragonite, dolomite, and siderite may be present.
Botryoidal "Grape" Amethyst Crystal Cluster
Mamuju Area, Sulawesi Barat Province, Sulawesi, Indonesia
9.5 x 8.5 x 4 cm
Wulfenite Crystals on Dolomite
Sidi Amer, Touissit, Toussit District, Jerada Province, Oriental Region, Morocco
9 x 8.5 x 4 cm
Blue Barite Crystals on Calcite
Near Stoneham, Weld County, Colorado, USA
8.5 x 7.5 x 5 cm
Fluorite Crystals on Calcite Matrix
Wushan, De'an, Jiangxi, China
14.5 x 11.5 x 3.5 cm

Fluorite Crystal Cluster
Mina La Viesca, La Colada, Pola se Siero, Asturias, Spain
12 x 10 x 6 cm

Prehnite ps. after Glauberite
Fanwood Quarry, Watchung, Somerset County, New Jersey, USA
13.5 x 6.4 x 5.8 cm
Ex-Dr. Ed David Collection
Very nice, aesthetic cluster of highly translucent Gypsum crystals. In very good condition.
A large beautiful plate of numerous, gemmy, dark purple tipped Amethyst crystals. In very good condition.
An excellent specimen of relatively "rare green colored" Barite crystals formed in an intricate "floral" pattern. In very good condition.
Very pretty, light purple Fluorite cluster with good translucency adorned with a Quartz crystal. In very good condition.
Beautiful formation of super glassy Hemimorphite crystals in a shallow vug. In very good condition.
Sharp, tetrahedral crystals of Tetrahedrite with great luster scattered among crystals of golden Pyrite, Galena and Quartz. In good condition.
A notable large two sided Prehnite pseudomorph from a less well known New Jersey Trap Rock basalt quarry. It is an attractive mint green, lustrous and moderately translucent specimen of Prehnite, which has replaced a dense, sculptural cluster of blocky Glauberite crystals on a basalt matrix. The pseudos are up to 3 cm in length. Prehnite usually pseudomorphs Anhydrite crystals from other well known New Jersey Trap rock quarries, making this exceptional piece from the Fanwood Quarry very unique. It is complete all around and pristine in the interior. A very desirable specimen from the collection of Dr. Ed David, who passed away in February, 2017.
Beautiful, gemmy to translucent, golden, doubly terminated Calcite crystals, measuring up to 13x7x7 cm perched on a solid matrix of Sphalerite from the famous Elmwood Mine. In good condition.
Numerous, super glassy and gemmy Fluorite crystals with beveled edges on matrix. Very nice and in very good condition.
Rich coverage of very gemmy, light greenish yellow Barite blades on a triangular shaped matrix. In very good condition.
Lustrous, creamy white, nail head crystals of Calcite crowning a contrasting brownish matrix. In very good condition.
A shallow vug covered with Chalcedony stalagmites interspersed with salmon colored Stilbite bowties. In good condition
Beautiful cluster of lustrous, silvery Pyrite crystals with an aesthetic partial covering of snow white Quartz from a recent find in Peru. In very good condition.
Pyrite cubes, measuring up to 3x3x2.5 cm, on Mari from the famous Navajun area. In very good condition.
A splendid, sculptural formation of  two sided Amethyst specimen from recent finds in Indonesia. These specimens were originally described as Agate, but recently have been shown to be Amethyst. Botryoidal Amethyst is very rare. This piece shows what appears to be two generations of Quartz. The first has the lavender to purple color more typical for Amethyst, while the second is very light lavender to snowy white in color - possibly caught in the process of transforming into the Amethyst variety of Quartz.
Hemihedral, sharp laminar crystals of bright yellow Wulfenite on an aesthetic formation of Dolomite. In very good condition.
Large, golden, barrel shaped Calcite crystals, measuring to 8.5 cm in length, with Marcasite and Fluorite on matrix. There appears to be a darker phantom in each Calcite, possibly an earlier Calcite that was later overgrown. In very good condition
Light blue, very translucent Barite crystals on nicely contrasting yellowish Calcite matrix. In good condition
Numerous, moderately translucent, purple Fluorite octahedrons on a Calcite matrix. In very good condition.
Very nice, teal blue, lustrous Fluorite crystal cluster from the La Viesca Mine in Spain. In very good condition.
A pretty stalagmatic formation of bluish gray to white Chalcedony. In good condition.
A pine cone like formation of highly lustrous, yellow Calcite crystals. Very presentable on all sides, except for a contact point on the lower back. In very good condition.
A very interesting pseudomorph where Quartz has been replaced by Anhydrite with a later growth of gemmy  small Calcite crystals on top of the blades. In good condition.
Check out the following mineral specimens on this page: Fluorite, Gypsum var. Selenite, Quartz var. Amethyst, Green Barite, Hemimorphite, Tetrahedrite with Pyrite, Galena & Quartz, Prehnite ps. after Glauberite, Calcite Crystals on Sphalerite, Barite Crystals on Matrix, Stilbite Crystals on Chalcedony in Vug, Pyrite Crystal Cluster with Quartz, Pyrite Crystals on Mari, Botryoidal "Grape" Amethyst, Wulfenite Crystals on Dolomite, Calcite Crystals with Marcasite & Fluorite, Blue Barite Crystals on Calcite, Multi-Colored Chalcedony Stalagmite, Anhydrite ps. after Quartz with Calcite, Sphalerite with Calcite, Wulfenite Crystals on Matrix, Siderite Crystal Cluster with Calcite, Epidote Crystals on Andradite, Hematinic Quartz with Calcite, Cuprian Adamite on Limonite and Malachite Crystals on Matrix.