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Mineral Updates
May 01, 2014
Garnets
This update contains Garnets from 2 famous localities: Almandine garnets from a flow banded rhyolite with lithophysae (vesicles) from the Garnet Fields recreational site near the town of Ely, Nevada and Red Grosular garnets from Sierra de Cruces in Coahuila, Mexico.
The Almandines from Nevada are classic US garnet specimens. Garnets from this location have been incorrectly labeled Spessartine by many collectors. Repeated chemical analyses have shown these garnets to be Almandine with Fe to Mn ratios of consistently about 2.5 Fe to 1 Mn. For example, see Hollabaugh, Curtis and Purcell, Victoria (1987): Garnet Hill, White Pine County, Nevada. Mineralogical Record 18 (3), 195-198.
Sierra de Cruces, Coahuila, Mexico has been inaccurately known since the 1950s as Lake Jaco, and has produced many colors of Grossular garnets. In December 1993, Graham Sutton and Bob Griffis discovered a small outcrop of bright Red garnets in a stark white matrix from an isolated hill (Cerro de Moka) at the south end of the Sierra de Cruces mountain range. The garnet-bearing outcrop was at the top of the hill and was completely removed over 2 field trips. The largest garnet crystal found was approximately 7 cm and resides in the Pohl collection at the Freiburg Museum. Less than 50 specimens have ever been on the market.
Garnets
This update contains Garnets from 2 famous localities: Almandine garnets from a flow banded rhyolite with lithophysae (vesicles) from the Garnet Fields recreational site near the town of Ely, Nevada and Red Grosular garnets from Sierra de Cruces in Coahuila, Mexico.
The Almandines from Nevada are classic US garnet specimens. Garnets from this location have been incorrectly labeled Spessartine by many collectors. Repeated chemical analyses have shown these garnets to be Almandine with Fe to Mn ratios of consistently about 2.5 Fe to 1 Mn. For example, see Hollabaugh, Curtis and Purcell, Victoria (1987): Garnet Hill, White Pine County, Nevada. Mineralogical Record 18 (3), 195-198.
Sierra de Cruces, Coahuila, Mexico has been inaccurately known since the 1950s as Lake Jaco, and has produced many colors of Grossular garnets. In December 1993, Graham Sutton and Bob Griffis discovered a small outcrop of bright Red garnets in a stark white matrix from an isolated hill (Cerro de Moka) at the south end of the Sierra de Cruces mountain range. The garnet-bearing outcrop was at the top of the hill and was completely removed over 2 field trips. The largest garnet crystal found was approximately 7 cm and resides in the Pohl collection at the Freiburg Museum. Less than 50 specimens have ever been on the market.
Specimen 1 - 9 of 9
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
$125
74 x 54 x 28 mm
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
Sold
53 x 46 x 25 mm
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
$155
92 x 56 x 26 mm
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
$95
60 x 46 x 38 mm
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
$100
74 x 46 x 41 mm
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
$115
80 x 42 x 31 mm
Almandine garnet
Garnet Hill, Ely, Robinson District, White Pine Co., Nevada, USA
Sold
60 x 46 x 30 mm
Grossular garnet
Cerro de Moka, Sierra de Cruces, Municipio de Sierra Mojada, Coahuila, Mexico
$125
70 x 65 x 51 mm
Grossular garnet
Cerro de Moka, Sierra de Cruces, Municipio de Sierra Mojada, Coahuila, Mexico
$300
100 x 70 x 52 mm