Mixed Minerals


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M957 - Gahnite $ 120 SOLD
Kagoro, Kaduna State, Nigeria
thumbnail - 0.7 x 0.7 x 0.7 cm


(click on an image to enlarge)

Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M957a.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M957b.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M957c.jpg]

Translucent to transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. A complete octahedron with small chips on 3 of the tips, otherwise perfect and a sharper than most example of this material. These were first discovered in 2001 and are found mostly of industrial quality. Though they don't get very large, the color is spectacular. The GIA has written a nice article about these crystals published in Gems & Gemology, Fall 2019, Vol. 55, No. 3.


M958 - Gahnite $ 140 SOLD
Kagoro, Kaduna State, Nigeria
thumbnail - 0.8 x 0.8 x 0.7 cm


(click on an image to enlarge)

Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M958a.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M958b.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M958c.jpg] Gahnite from Kagoro, Kaduna State, Nigeria [db_pics/pics/M958d.jpg]

Translucent to transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. A complete octahedron with small chips on 2 of the tips, otherwise perfect and a sharper than most example of this material. These were first discovered in 2001 and are found mostly of industrial quality. Though they don't get very large, the color is spectacular. The GIA has written a nice article about these crystals published in Gems & Gemology, Fall 2019, Vol. 55, No. 3.


M981 - Galena with Sphalerite $ 75
Joplin, Missouri, USA
small cabinet - 7 x 5 x 4 cm


(click on an image to enlarge)

Galena with Sphalerite from Joplin, Missouri, USA [db_pics/pics/M981a.jpg] Galena with Sphalerite from Joplin, Missouri, USA [db_pics/pics/M981c.jpg] Galena with Sphalerite from Joplin, Missouri, USA [db_pics/pics/M981d.jpg] Galena with Sphalerite from Joplin, Missouri, USA [db_pics/pics/M981e.jpg] Galena with Sphalerite from Joplin, Missouri, USA [db_pics/pics/M981g.jpg]

A 3cm crystal of cubic Galena on a thin piece of matrix covered on both sides by crystals of translucent red Sphalerite. The Sphalerite crystals reach 1.5cm in size. Undamaged.


M976 - Sphalerite var. Marmatite with Siderite $ 150
Eagle Mine, Gilman, Colorado, USA
small cabinet - 7.5 x 5.5 x 3.4 cm


(click on an image to enlarge)

Sphalerite var. Marmatite with Siderite from Eagle Mine, Gilman, Colorado, USA [db_pics/pics/M976a.jpg] Sphalerite var. Marmatite with Siderite from Eagle Mine, Gilman, Colorado, USA [db_pics/pics/M976b.jpg] Sphalerite var. Marmatite with Siderite from Eagle Mine, Gilman, Colorado, USA [db_pics/pics/M976c.jpg] Sphalerite var. Marmatite with Siderite from Eagle Mine, Gilman, Colorado, USA [db_pics/pics/M976d.jpg] Sphalerite var. Marmatite with Siderite from Eagle Mine, Gilman, Colorado, USA [db_pics/pics/M976e.jpg] Sphalerite var. Marmatite with Siderite from Eagle Mine, Gilman, Colorado, USA [db_pics/pics/M976f.jpg]

Highly lustrous and bright crystals of Marmatite, an iron-rich variety of Sphalerite, with attached crystals of Siderite. The specimen is solid Marmatite without matrix. Undamaged.
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