Mineral Specimens with Hanksite

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4AA36 - Hanksite - SOLD
Searles Lake, San Bernadino County, California, USA
thumbnail, 2.1 x 1.5 x 1.5 cm

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Hanksite from Searles Lake, San Bernadino County, California, USA [db_pics/pics/4aa36a.jpg]

A sharp crystal, complete all around, showing unusual barrel-shaped form

MD-180024 - Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
small cabinet, 5.8 x 2.2 x 2.2 cm.

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Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-180024a.jpg]

5.8 x 2.2 x 2.2 cm. An unusual crystal form, elongated stark hexagonal crystal, for the species. This specimen is partially dehydrated. Ex. Martin Zinn Collection.

MD-187665 - Tincalconite, Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
small cabinet, 8.0 x 6.0 x 5.5 cm.

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Tincalconite, Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-187665a.jpg]

8.0 x 6.0 x 5.5 cm. A superb combination specimen of rare species from Searles Lake, California and the Jim Minette Collection. A pristine, doubly terminated, sharply hexagonal, translucent hanksite crystal is aesthetically capped by snow-white tincalconite pseudomorphing a very blocky borax crystal. Hanksite is a rare sulfate and tincalconite is a rare borate. Searles Lake is the Type Locality for both species.

MD-23142 - Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
small cabinet, 8.5 x 5.5 x 5 cm

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Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-23142a.jpg]

Hanksite is a rare anhydrous chloro-carbonate of potassium and sodium first described in 1885. It is very unusual in that it consists of both sulfate and carbonate ion groups, which has led to some confusion about which group to place it in. At any rate, it forms nice crystals in evaporite deposits. This one is from the type locality at Searles Lake, and it is just superb in every way: doubly-terminated, with two fine, flat terminations; perfect hexagonal form; nice translucency; and, really impressive size. If you don’t have one, here’s a really fine one! 8.5 x 5.5 x 5 cm

MD-27109 - Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
small cabinet, 5.9 x 5.1 x 4.0 cm

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Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-27109a.jpg]

A fine example of an evaporite mineral that is uncommon on the market, dug with great labor from the clay of ancient lake beds. This is a perfect, doubly-terminated hexagonal crystal, attached to two smaller, ALSO doubly-terminated crystals. In the light, the large crystal is actually quite transparent! 5.9 x 5.1 x 4.0 cm

MD-32367 - Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
small cabinet, 8.4 x 4.7 x 4.5 cm

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Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-32367a.jpg]

A HUGE, perfect, doubly-terminated crystal of the rare evaporite mineral hanksite, found in the clay that formed the floor of an ancient seabed, in California. The crystal is translucent, complete all around, and just superb for what it is. How many of these have you seen around? 8.4 x 4.7 x 4.5 cm

MD-44132 - Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
cabinet, 9.6 x 7.5 x 6.1cm

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Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-44132a.jpg]

A superb specimen of fine crystals of a very strange California mineral. (From Amethyst Galleries): "Hanksite is an unusual mineral mostly because of its formula. It is one of only a handful of minerals that contain both carbonate and sulfate ion groups. This brings up the question: to what mineral class does it belong? Some mineral references place it in the carbonates while others put it in with the sulfates. Hanksite forms very nice crystals in evaporite deposits. These evaporite deposits occur in arid environments. Water, carrying dissolved minerals, floods into a dry lake beds and then just sits. The arid conditions evaporate the water and concentrate the ions. When the water is almost gone, crystals start to form. The mineral halite (salt) is one of the first minerals to crystallize. As the water becomes even more concentrated, eventually rare and unusual minerals such as borax or hanksite will crystallize too." The crystals here are doubly-terminated, translucent-to-transparent, and measure up to 6 cm. 9.6 x 7.5 x 6.1cm

MD-44449 - Hanksite - - Archived
Searles Lake, San Bernardino Co., California, USA
cabinet, 11.1 x 10.2 x 7.3cm

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Hanksite from Searles Lake, San Bernardino Co., California, USA [db_pics/mdpics/MD-44449a.jpg]

This is an enormous, beautifully-formed crystal of translucent hanksite from the type locality in California. From Mineral Galleries: "Hanksite is an unusual mineral mostly because of its formula. It is one of only a handful of minerals that contain both carbonate and sulfate ion groups. This brings up the question: to what mineral class does it belong? Some mineral references place it in the carbonates while others put it in with the sulfates. We have placed it in the sulfate class simply because there are more sulfate groups in its structure than carbonate groups. Hanksite forms very nice crystals in evaporite deposits. These evaporite deposits occur in arid environments. Water, carrying dissolved minerals, floods into a dry lake beds and then just sits. The arid conditions evaporate the water and concentrate the ions. When the water is almost gone, crystals start to form. The mineral halite (salt) is one of the first minerals to crystallize. As the water becomes even more concentrated, eventually rare and unusual minerals such as borax or hanksite will crystallize too." The display side of this giant crystal shows unbelievably good symmetrical form for a crystal this size. The crystal is complete all the way around, with no damage! NOTE: must be kept out of humidity, or in a sealed box, or coated lightly with shellac or mineral oil. 11.1 x 10.2 x 7.3cm

MRZ203 - Hanksite - SOLD
Searles Dry Lake, Trona, California, USA
miniature, 5.8 x 2.2 x 2.2 cm

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Hanksite from Searles Dry Lake, Trona, California, USA [db_pics/pics/mrz203a.jpg]

An unusual crystal form, elongated stark hexagonal crystal, for the species. This specimen is partially dehydrated and must be coated with oil and kept in a dry environment to preserve it, but for the XL habit it is worth doing so.

ORDWAY-37 - Hanksite (TYPE LOC.) - $ 1200
Searles Lake, near Trona, San Bernardino Co., California, USA
small cabinet, 9.7 x 7.4 x 7.2 cm

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Shaped like a barrel with amazingly sharp, textbook-hexagonal symmetry, this is a large, translucent hanksite crystal in superb condition ! It has two smaller crystals emerging from its center for accents. Note that these are lightly oiled with mineral oil to preserve them from changing environments (from the very wet and saturated environment in which they formed). As long as they are kept in air-conditioning and not exposed to profound dry air, they should be stable.

ORDWAY-44 - Hanksite - Giant Crystal from TYPE LOC. - $ 2500
Searles Lake, near Trona, San Bernardino Co., California, USA
large cabinet, 18.2 x 15.9 x 12.3 cm

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Several hanksite crystals, highlighted by a superbly formed, doubly terminated, crystal, 8.4 cm in length, are emplaced on matrix. The crystals exhibit a matte luster, good translucence. Note that these are lightly oiled with mineral oil to preserve them from changing environments (from the very wet and saturated environment in which they formed). As long as they are kept in air-conditioning and not exposed to profound dry air, they should be stable. This is a stunning and important example of the species, collected by Al Ordway sometime in the 1960s or 1970s

ORDWAY-45 - Hanksite - Giant Crystal from TYPE LOC. - $ 2500
Searles Lake, near Trona, San Bernardino Co., California, USA
large cabinet, 18.6 x 14.7 x 13.8 cm

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This hanksite specimen is highlighted by a huge, doubly terminated, well formed crystal that reaches 16 cm in length. It's so symmetrical that its hexagonal form is textbook sharp and mesmerizing for any species. It is emplaced on matrix with a few smaller hanskite crystals, all of which exhibit matte luster and good translucence withan unusual golden gray color. Note that these are lightly oiled with mineral oil to preserve them from changing environments (from the very wet and saturated environment in which they formed). As long as they are kept in air-conditioning and not exposed to profound dry air, they should be stable. This is a stunning and important example of the species, collected by Al Ordway sometime in the 1960s or 1970s

ORDWAY-70 - Hanksite - $ 400 SOLD
Searles Lake, San Bernardino County, California, USA
small cabinet, 5.7 x 5.4 x 4.6 cm

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From the type locality for hanksite, this SHARP specimen features a large, doubly terminated, translucent hanksite crystal, 5.7 cm across that exhibits matte luster. THIS IS VERY GEMMY and transparent! The large crystal sits perfectly on a smaller one which acts as a pedestal. Self-collected by Al Ordway over many trips to this locality. NOTE: these are coated with mineral oil to preserve them from dehydration in humid environments - best kept in cool, dry environments.

ORDWAY-71 - Hanksite - $ 250 SOLD
Searles Lake, San Bernardino County, California, USA
small cabinet, 7.3 x 6.0 x 5.1 cm

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This is another, large, doubly terminated, translucent, grayish yellow hanksite crystal, measuring 7.3 cm across, and emplaced on smaller hanksite crystals. Self-collected by Al Ordway over many trips to this locality.NOTE: these are coated with mineral oil to preserve them from dehydration in humid environments - best kept in cool, dry environments.

ORDWAY-72 - Hanksite - $ 250
Searles Lake, San Bernardino County, California, USA
small cabinet, 8.8 x 6.2 x 5.2 cm

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A near floater, this hanksite specimen features several intergrown crystals. It exhibits some luster,an attractive greenish -gray color and fair translucence. It is significantly different in color and form from the other hanksite specimens in this update. Self-collected by Al Ordway over many trips to this locality. NOTE: these are coated with mineral oil to preserve them from dehydration in humid environments - best kept in cool, dry environments.

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Rob Lavinsky, rob@irocks.com

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