Dan Costian's Photo Gallery

7HX-AG1Kentrolite Pb₂Mn³⁺₂(Si₂O₇)O₂

Big Chief Mine, Percha Creek, Hillsboro, Hillsboro Mining District, Sierra County, New Mexico, USA

Dimensions: 2.2 cm x 1.2 cm

Kentrolite.
Photographed by, and in the collection of Dan Costian.

6K5-8YLMalachite Cu₂(CO₃)(OH)₂

Kolwezi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo

Dimensions: 5.3 cm x 4.1 cm

Spotted convex-concave (alveolar) malachite crust.
Photographed by, and in the collection of Dan Costian.

G73-LNDQuartz (Var: Amethyst) SiO₂

Cacharai mine, Porto Velho, Rondônia, Brazil

Dimensions: 3.9 cm x 5.5 cm

Amethyst manifesting asterism (trapiche).
Photographed by, and in the collection of Dan Costian.

WR9-FA9Quartz SiO₂

Hot Springs, Garland County, Arkansas, USA

Dimensions: 4.8 cm x 8.1 cm

Dauphiné-law quartz with narrow steep rhombohedral faces.
Ex Mark Carter Collection.
Photographed by, and in the collection of Dan Costian.

6EA-LYTSpinel MgAl₂O₄

Amity, Town of Warwick, Orange County, New York, USA

Dimensions: 1.3 cm x 1.5 cm

Twinned black spinel. Collected October 1992.
Ex Melvin Machin Collection.
Photographed by, and in the collection of Dan Costian.

TRM-45LNormandite NaCa(Mn,Fe)(Ti,Nb,Zr)(Si₂O₇)OF , Aegirine-augite (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆

Partomchorr Mountain, Khibiny Massif, Murmansk Oblast, Russia

Dimensions: 3.6 cm x 2.5 cm

Normandite and aegirine on matrix.
Ex Melvin Machin Collection.
Photographed by, and in the collection of Dan Costian.

3EK-FVYChondrodite Mg₅(SiO₄)₂F₂ , Warwickite (Mg,Ti,Fe,Al)₂O(BO₃)

Amity, Town of Warwick, Orange County, New York, USA

Dimensions: 3.4 cm x 2.5 cm

Orange chondrodite and dark warwickite on matrix.
Ex Melvin Machin Collection.
Photographed by, and in the collection of Dan Costian.

XCE-H09Warwickite (Mg,Ti,Fe,Al)₂O(BO₃) , Chondrodite Mg₅(SiO₄)₂F₂

Amity, Town of Warwick, Orange County, New York, USA

Dimensions: 3.4 cm x 2.5 cm

Dark warwickite, orange chondrodite, and unidentified green crystals on matrix.
Ex Melvin Machin Collection.
Photographed by, and in the collection of Dan Costian.

DMQ-P6WClaudetite As₂O₃

Saxonia dump slag locality, Freiberg smelter, Freiberg, Mittelsachsen, Saxony, Germany

Dimensions: 1.1 cm x 0.6 cm

Colorless claudetite on matrix.
Photographed by, and in the collection of Dan Costian.

7KK-QATTuperssuatsiaite Fe³⁺Fe³⁺₂(Na◻)◻₂Si₈O₂₀(OH)₂(H₂O)₄·2H₂O

Aris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia

Dimensions: 1 cm x 0.5 cm

Radial acicular tuperssuatsiaite on matrix.
Photographed by, and in the collection of Dan Costian.