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Mineral Specimens with Quartz
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3.6 x 2.4 x 2.0 cm. A superb and aesthetic fluorite and quartz combination from the Yaogangxian Mine and the Steve Smale Collection. A shimmering, water-clear, beautiful blue fluorite cube is dramatically impaled by a gem, water-clear, quartz "spear". Two, smaller quartz crystal add character.
9.8 x 9.0 x 5.3 cm. An aesthetic and excellent fluorite specimen from the recent finds at Riemvasmaak, South Africa. Gemmy and lustrous, unique grass-green fluorite octahedrons to 3.8 cm are beautifully clustered on the starkly contrasting, 3-dimensional quartz crystal matrix.
7.3 x 2.5 x 2.1 cm. An old-time, rare, doubly terminated, floater, smoky quartz crystal from near Florissant, Colorado. This lustrous, pristine, complete all-around crystal is transparent and is very well striated. I particularly like the shape and single and multiple terminations. Certainly around 100 years old. Ex. Richard Hauck Collection.
4.5 x 2.8 x 2.2 cm. This specimen is a great miniature size piece consisting of superb quality, sharp, gemmy, highly lustrous, prismatic, light purple color "reverse" scepter crystals of Amethyst measuring up to 8 mm sitting atop white/colorless, modified rhombohedra of Calcite on matrix. This piece is remarkable for Bolivia as it features a type of crystallization that is virtually unheard of from Bolivia.
12.9 x 8.8 x 7.3 cm. The Siglo Veinte mine is one of the most impressive Bolivian localities. It is the type locality for many "best in the world" species, and it even produces some amazing specimens of common species like Quartz. The Japan-Law twin Quartz specimens are well known in the mineral world and this piece is a great example of that material. The specimen it self hosts dozens if not hundreds of absolutely water-clear, razor sharp, highly lustrous, prismatic colorless Quartz crystals, plus three Japan-Law twins. Unfortunately, two of the twins are not complete, but one of them is (close-up).
MD-228519 - Goethite, Hematite, Siderite, Quartz (Var: Smoky Quartz) - - Archived
R. A. Kosnar claim, Yucca Hill, Steven's Ranch, Lake George, Park Co., Colorado, USA
small cabinet, 7.2 x 3.4 x 2.6 cm.
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7.2 x 3.4 x 2.6 cm. This is a great specimen from one of the most storied and well known districts in Colorado. The pegmatites near the Lake George area of Colorado have produced what most collectors and dealers consider to be the finest Amazonite specimens from the standpoint of superb color, top quality, wonderful display specimens and excellent associations. This particular specimen has no Amazonite, but it is a nice display piece featuring sharp, lustrous, golden-black "needles" of Goethite and metallic grey pseudmorphs of Hematite after Siderite sitting atop a translucent Smoky Quartz crystal. According to Rich Kosnar, Hematite pseudomorphs on Goethite were very rare, and this specimen was the only piece from this claim to show them associated in this manner. This specimen was collected nearly 30 years ago (August of 1980), when Richard Kosnar found some of the finest color Amazonite from Colorado extant. Ex. Richard Kosnar Collection.
MD-228525 - Rhodochrosite, Tetrahedrite, Quartz, Pyrite, Galena - - Archived
Sweet Home Mine (Home Sweet Home Mine), Mount Bross, Alma District, Park Co., Colorado, USA
small cabinet, 6.5 x 3.8 x 2.2 cm.
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6.5 x 3.8 x 2.2 cm. Richard Kosnar mined the Sweet Home for a few years during the late 1970's and collectwd some excellent Rhodochrosite specimens. This piece features translucent, pink crystals of rhombic Rhodochrosite up to 4 mm which are associated with Tetrahedrite, Quartz, Pyrite and Galena. Ex. Richard Kosnar Collection.
14 x 8 x 7 cm. This large example of Japan-law twinning in quartz was purchased by Dr. Ed David, former science advisor to President Nixon and a chair of the White House Science Office, in 1993. It is an outstanding example of good size. The specimen is very lustrous, very bright, and has an unusually good thickness to it. Most twins of this habit are skinny, but this is fat: 4.5 cm across at the twin plane in the middle. It is nearly pristine. Weighs 925 grams. Twins of this habit, in this size, are uncommon.
9.0 x 6.5 x 1.9 cm. This specimen was found about 5-6 months ago, and is a very attractive Cassiterite association specimen. Bolivia has probably produced more tin than any other country in the world. The great tin mines at Viloco (sometimes called Araca) have produced some of the most magnificent Cassiterite specimens extant. This particular specimen hosts several fine, sharp, highly lustrous, black-brown cyclic twinned crystals measuring up to 1.5 cm across which are associated with Quartz crystals that actually have small Smoky Quartz "phantoms" in the center of the prisms.
9.9 x 8.2 x 6.4 cm. A fine and unusual specimen from the Richard Hauck Collection and Minas Gerais, Brazil. The water-clear quartz crystals are heavily invested with schorl needles. None of the multitude of schorl crystals protrude out of the quartz crystals. I like the jackstraw pattern of quartz crystals and how the pearlescent cleavelandite compliments and accents the dark, included quartz crystals. The two, tiny, schorl-included quartz crystals on the cleavelandite are a very nice accent. The large quartz crystal is 9.5 cm and is doubly terminated. The lower, large quartz crystal is also doubly terminated and is 9.0 cm long.
11.0 x 10.8 x 9.4 cm. An old-time cabinet milky quartz crystal cluster from an uncommon Connecticut locality - the Diamond Ledge, Stafford. Lustrous crystals in an appealing pattern comprise this piece from the Richard Hauck Collection. All of the major crystals are pristine.
10.4 x 8.0 x 3.4 cm. An excellent, very rich and uncommon cabinet combination specimen from a new find at the Daoping Mine of China. Lustrous, translucent, "wet-look", apple-green pyromorphite barrels to 6 mm are festooned on the curved crust of blunt-tipped, milky quartz crystals. This is a rare combination, the very first find of pyromorphite on quartz from Daoping.
5.3 x 4.7 x 2.7 cm. A fine, mounded, 3-dimensional cluster of amethyst-tipped quartz crystals from the Goboboseb Mountains of Brandberg, Namibia. I particularly like the way the largest crystals are perched, smokestack-like, at the top of the piece. Brandberg amethyst clusters of this style are relatively uncommon.
Sharp, gemmy red crystals to 1.25 cm perched on quartz matrix, from the find of last fall that was really redefined Chinese sphalerites! 7.1 x 5 x 3 cm
13.2 x 11.5 x 5.7 cm. Mirror-bright, brassy pyrite cubes to 1.5 cm are richly and aesthetically strewn about on a cabinet matrix plate of transparent to translucent quartz crystals. This fine specimen is from the Shangbao Mine of China.
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Rob Lavinsky, rob@irocks.com
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Mineral Specimens by species; or
by specimen id.
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![Fluorite, Quartz from Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-228359a.jpg]](db_pics/mdpics/MD-228359a.jpg)
![Fluorite, Quartz from Riemvasmaak, Kakamas District, Northern Cape Province, South Africa [db_pics/mdpics/MD-228362a.jpg]](db_pics/mdpics/MD-228362a.jpg)
![Quartz (Var: Smoky Quartz) from Florissant (Topaz Butte), Crystal Peak area, Teller Co., Colorado, USA [db_pics/mdpics/MD-228395a.jpg]](db_pics/mdpics/MD-228395a.jpg)
![Quartz (Var: Amethyst) from Bombori, Chayanta Province, Potosà Department, Bolivia [db_pics/mdpics/MD-228420a.jpg]](db_pics/mdpics/MD-228420a.jpg)
![Quartz (Var: Amethyst) from Bombori, Chayanta Province, Potosà Department, Bolivia [db_pics/mdpics/MD-228420b.jpg]](db_pics/mdpics/MD-228420b.jpg)
![Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-228506a.jpg]](db_pics/mdpics/MD-228506a.jpg)
![Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-228506b.jpg]](db_pics/mdpics/MD-228506b.jpg)
![Goethite, Hematite, Siderite, Quartz (Var: Smoky Quartz) from R. A. Kosnar claim, Yucca Hill, Steven's Ranch, Lake George, Park Co., Colorado, USA [db_pics/mdpics/MD-228519a.jpg]](db_pics/mdpics/MD-228519a.jpg)
![Rhodochrosite, Tetrahedrite, Quartz, Pyrite, Galena from Sweet Home Mine (Home Sweet Home Mine), Mount Bross, Alma District, Park Co., Colorado, USA [db_pics/mdpics/MD-228525a.jpg]](db_pics/mdpics/MD-228525a.jpg)
![Rhodochrosite, Tetrahedrite, Quartz, Pyrite, Galena from Sweet Home Mine (Home Sweet Home Mine), Mount Bross, Alma District, Park Co., Colorado, USA [db_pics/mdpics/MD-228525b.jpg]](db_pics/mdpics/MD-228525b.jpg)
![Quartz from Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil [db_pics/mdpics/MD-229544a.jpg]](db_pics/mdpics/MD-229544a.jpg)
![Cassiterite, Quartz from Viloco Mine (Araca mine), Loayza Province, La Paz Department, Bolivia [db_pics/mdpics/MD-229560a.jpg]](db_pics/mdpics/MD-229560a.jpg)
![Cassiterite, Quartz from Viloco Mine (Araca mine), Loayza Province, La Paz Department, Bolivia [db_pics/mdpics/MD-229560b.jpg]](db_pics/mdpics/MD-229560b.jpg)
![Cassiterite, Quartz from Viloco Mine (Araca mine), Loayza Province, La Paz Department, Bolivia [db_pics/mdpics/MD-229560c.jpg]](db_pics/mdpics/MD-229560c.jpg)
![Quartz, Schorl, Albite (Var: Cleavelandite) from Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-229573a.jpg]](db_pics/mdpics/MD-229573a.jpg)
![Quartz, Schorl, Albite (Var: Cleavelandite) from Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-229573b.jpg]](db_pics/mdpics/MD-229573b.jpg)
![Quartz (Var: Milky Quartz) from Diamond Ledge, Stafford, Tolland Co., Connecticut, USA [db_pics/mdpics/MD-229575a.jpg]](db_pics/mdpics/MD-229575a.jpg)
![Pyromorphite, Quartz from Daoping Mine (Tangping Mine), Gongcheng City, Gongcheng Co., Guilin Prefecture, Guangxi Zhuang Autonomous Region, China [db_pics/mdpics/MD-229576a.jpg]](db_pics/mdpics/MD-229576a.jpg)
![Pyromorphite, Quartz from Daoping Mine (Tangping Mine), Gongcheng City, Gongcheng Co., Guilin Prefecture, Guangxi Zhuang Autonomous Region, China [db_pics/mdpics/MD-229576b.jpg]](db_pics/mdpics/MD-229576b.jpg)
![Quartz (Var: Amethyst) from Goboboseb Mountains, Brandberg area, Brandberg District, Erongo Region, Namibia [db_pics/mdpics/MD-229580a.jpg]](db_pics/mdpics/MD-229580a.jpg)
![Sphalerite, Quartz from Rucheng Mine, Chaojia, Nuanshui, Rucheng Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-22959a.jpg]](db_pics/mdpics/MD-22959a.jpg)
![Pyrite, Quartz from Shangbao Pyrite mine, Leiyang Co., Hengyang Prefecture, Hunan Province, China [db_pics/mdpics/MD-229622a.jpg]](db_pics/mdpics/MD-229622a.jpg)
![Pyrite, Quartz from Shangbao Pyrite mine, Leiyang Co., Hengyang Prefecture, Hunan Province, China [db_pics/mdpics/MD-229622b.jpg]](db_pics/mdpics/MD-229622b.jpg)