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Mineralati

Minerals

6323 results

Exceptional sample of the extremely rare demicheleite-(Cl) (IMA 2008-020) in well formed red microcrystals and associated to white godovikovite. The mineral is found only in this locality worldwide and it has an unusual chemistry, as it is a bismuth sulphide chloride (BiSCl). From: La Fossa Crater, Vulcano Island, Messina Province, Sicily, Italy. Mineral

Demicheleite-(Cl)

demicheleite-(Cl)

Formula
BiSCl
Mineral

Demicheleite-(I)

demicheleite-(I)

Formula
BiSI
Mineral

Dendoraite-(Nh4)

dendoraite-(NH4)
White crystals of the very rare mineral denisovite from the type locality (Eveslogchorr Mountain, Khibiny Massif, Kola, Russian Federation) and only one of the three known localities worldwide. Mineral

Denisovite

denisovite

Formula
K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x)*2H2O
Denningite, Tellurite Locality: Moctezuma Mine (Bambolla Mine), Moctezuma, Municipio de Moctezuma, Sonora, Mexico (Locality at mindat.org) Size: 5.5 x 4.3 x 2.2 cm. Denningite is found only at this mine, the type locality for the species recognized in 1961 from material found in the 1940s-1950s. One of the surprises of 2007 for rarities was the reworking of the famous old Bambolla mine in the Moctezuma tellurium complex for specimens, by several European-led collecting teams. Many specimens were then sold at Munich 2008 and this year in Tucson. This is a very rich specimen with vitreous, very nice yellow, elongated crystals of denningite admixed with microcrystalline or acrystalline yellow tellurite. I am told that mixed with the denningite is often spiroffite, and the two are often mislabeled one way or the other, but this has not been determined for this specimen. Type locality. Mineral

Denningite

denningite

Formula
CaMn²⁺Te⁴⁺4O10
Mineral

Depmeierite

depmeierite

Formula
Na8(Al6Si6O24)(PO4,CO3)1-x * 3H2O (x<0.5)
Black derbylite microcrystals, a rare Fe-Ti-Sb oxide mineral only known from two localities worldwide, on a contrasting matrix. The specimens from Buca della Vena (Apuan Alps, Lucca Province, Tuscany, Italy) are, by far, the most aesthetic for the species Mineral

Derbylite

derbylite

Formula
Fe³⁺4Ti⁴⁺3Sb³⁺O13(OH)
Derriksite, Malachite Locality: Musonoi Mine, Kolwezi, Western area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) (Locality at mindat.org) Size: 8.5 x 4 x 4.5 cm. Good sized crystals of the very rare copper-uranium-selenite Derriksite on a bed of Malachite. The mineral occurs rarely as good visible, bottle green crystals. The matrix is selenium-rich Digenite. This specimen was recovered when the uranium dump of Musonoi was sent to the Kolwezi concentrator in the early 1990’s. Musonoi is the type and only known locality for Derriksite where it is known as the rarest of the selenites. Mineral

Derriksite

derriksite

Formula
Cu4(UO2)(Se⁴⁺O3)2(OH)6
Mineral

Dervillite

dervillite

Formula
Ag2AsS2
Desautelsite Locality: Artinite pit, Clear Creek area, New Idria District, Diablo Range, San Benito County, California, USA (Locality at mindat.org) Size: 3.6 x 3.4 x 2.6 cm. A reference specimen with massive desautelsite in matrix. Ex. Martin Zinn Collection. Mineral

Desautelsite

desautelsite

Formula
Mg6Mn³⁺2(CO3)(OH)16·4H2O
Descloizite. Locality: Eukas mine, Southwest Africa. Exposed in the Mineralogical Museum, Bonn, Germany Mineral

Descloizite

descloizite

Formula
PbZn(VO4)(OH)
Despujolsite Locality: N'Chwaning III Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, en:South Africa (Locality at mindat.org) A rare matrix specimen, one of only a few recovered when the miners scraped out this pocket. It has a dozen good crystals, many to 1 cm, on manganese gangue matrix. This is the richest single specimen we know of from the find, to date. Collected in the summer of 2010. Analyzed by Dr. Robert Downs at the University of Arizona. 1.8 x 1.7 x 0.6 cm. Mineral

Despujolsite

despujolsite

Formula
Ca3Mn⁴⁺(SO4)2(OH)6·3H2O
Mohs
2.5
Mineral

Dessauite-(Y)

dessauite-(Y)

Formula
Sr(Y,U,Mn)(Ti,Fe,Cr,V)18(O,OH)38
La destinezita es un raro fosfato-sulfato de hierro, cuya localidad tipo se encuentra en Argenteau (Bélgica) y este ejemplar que presentamos procede de esta localidad. Muestra la característica forma arriñonada, nodular, con un tono beige. Una pieza para coleccionistas de TL y sistemáticos. Medidas: 4.0 x 3.5 x 2.4 cm. Encontrado en ±1990's. Mineral

Destinezite

destinezite

Formula
Fe³⁺2(PO4)(SO4)(OH)·6H2O
White aggregates of the rare cerium oxalate mineral deveroite-(Ce) from a locality in India (Kodanda Rama Mine, Nellore District, Andhra Pradesh, India). Ex. Erich Laskowski collection (USA). Mineral

Deveroite-(Ce)

deveroite-(Ce)

Formula
Ce2(C2O4)3·10H2O
Mineral

Devilliersite

devilliersite

Formula
Ca4Ca2Fe³⁺10O4[(Fe³⁺10Si2)O36]
Devilline Locality: Špania Dolina (Urvölgy; Herrengrund), Špania Dolina ore belt, Starohorské Mts, Banská Bystrica Region, Slovakia (Locality at mindat.org) Size: miniature, 4.7 x 2.4 x 2.2 cm Devilline This is an extremely important specimen of the mineral formerly known as "Herrengrundite," clearly of a very rare and unique habit that dates it to major finds here in the mid-1800s . Specimens are represented in this quality only in museums today (and in a very few specimens in private hands, such as a famous piece ex. Archduke Stephan collection which I had the luck to handle in 2001!). Clusters of robust large crystals such as these, on the contrasting matrix, have been sought after by collectors ever since, and though more devilline has been found in recent years it has not approached this quality. The piece is very beautiful and elegant, making this a competition-level miniature with unusual balance and aesthetics. As well, it is simply significant for the rarity and historic importance of the species. Mineral

Devilline

devilline

Formula
CaCu4(SO4)2(OH)6·3H2O
Mohs
2.5
Mineral

Devitoite

devitoite

Formula
[Ba6(PO4)2(CO3)][Fe²⁺7(OH)4Fe³⁺2O2(SiO3)8]
Dewindtite Locality: Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) Yellow tabular dewindtite crystals. Field of view 4 mm. Mineral

Dewindtite

dewindtite

Formula
H2Pb3(UO2)6O4(PO4)4·12H2O
Mohs
2.75
Mineral

Dewitite

dewitite
Mineral

Deynekoite

deynekoite
Caledonite, Diaboleite Locality: Mammoth-Saint Anthony Mine (Mammoth-St Anthony Mine; Mammoth Mine; St. Anthony Mine), St. Anthony deposit, Tiger, Mammoth District, Pinal County, Arizona, USA (Locality at mindat.org) Size: miniature, 5.0 x 4.2 x 2.6 cm Caledonite with Diaboleite The color of this caledonite is like nothing you could imagine, in person. It looks fake, like lab-grown copper sulphate but with metallic lustre. This is a frankly unbelieveable caledonite specimen of a richness I have never seen for sale on the market before. It is solid caledonite, with sharp crystals poking out all over, and with minor deeper blue Diaboleite crystals on the backside as a free bonus. It displays nicely, and presents so much stunning intense blue color that I had trouble believeing what I was looking at when I held this for the first time. My mind kept tellin gme it had to be caledonite on azurite - no caledonite could be so rich?! It is likely that this piece was mined prior to 1960. ex. American Museum of Natural History and was held since its deaccession by Larry Conklin in the Conklin Family Collection (specializing in such rarities in miiature size). It is an amazing example for the species but beyond that, an impressive, display-quality, historic US classic - its appreciably valuable from ANY angle of perspective in terms of history and significance and aesthetics, in other words. Even in the major Arizona collections, such a piece would be considered one of the capstones. Mineral

Diaboleite

diaboleite

Formula
CuPb2Cl2(OH)4
Mohs
2.5
Diadochite - Exposed in the Mineralogical Museum, Bonn, Germany Locality: Lodenitz, Böhmen Mineral

Diadochite

diadochite

Formula
Fe³⁺2(PO4)(SO4)(OH)·6H2O
This specimen is a fragment of a much larger diamond that is thought to have been composed of yet another fragment that is mentioned historically throughout the 18th and 19th centuries as a 135 carat gem and which was weighed in 1911 for the old royal palaces' Inventory as a 27.7 g (138.5 carats) stone. The brownish hue is due to superficial ferrous impurities that constitute evidence of the geological sedimentary context in which it was found. This diamond is potentially colourless. Mineral

Diamond

Formula
C
Mohs
10
Colour
Colourless to varied