Hanksite

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 ...

© Rob Lavinsky & irocks.com

Big crystal of Hanksite on a matrix composed of several Borax white crystals. Cube = 1 cm. Photo & Collection Chinellato Matteo. Canon 20D + Canon 17-85 mm USM IS

© Chinellato Matteo

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 ...

© Rob Lavinsky & irocks.com

18.2 x 15.9 x 12.3 cm. 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 ...

© Rob Lavinsky & irocks.com

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

© Rob Lavinsky & irocks.com

5.7 x 5.4 x 4.6 cm. 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 ...

© Rob Lavinsky & irocks.com

16.3 x 13.8 x 7.4 cm. Emplaced on snow white tincalconite, an alteration product of other borate minerals, are several very fine, translucent hanksite crystals to 8 cm across. The largest crystals are also doubly terminated and exhibit a rather attractive gray color. Self-collected by Al Ordway over many trips to this locality. NOTE: these are ...

© Rob Lavinsky & irocks.com

8´5x8 cm

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 ...

© Rob Lavinsky & irocks.com

Thick tabular hexagonal crystals of hanksite, two large ones intergrown back to back, and several smaller ones, translucent, dark green. Front side. Donated to Colorado Mesa University in September 2022.

© Lawrence Violett

Photo & specimen J.Ralph. Crystal 8cm long

60 mm long euhedral hanksite crystal with a small hexagonal "bud" growing out of the larger crystal. RFC M1849.

© 2008 Michael C. Roarke

5.5 x 4.7 x 4.2 cm From the type locality for hanksite, this sharp specimen features a large, doubly terminated, translucent hanksite crystal, 5.5 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 ...

© Brian Kosnar - Mineral Classics

A large (4 inch long) Hanksite crystal from a classic location

© 2005 - "Orbital" Joe Kienle - Some Rights Reserved

Large single Hanskite crystal from Lake Searles, CA. Specimen measure approximately 12.5 x 6.5 cm.

© Peter Hargis

18 mm crystal. Photograph by Peter Cristofono.

© 2004 Peter Cristofono

Name: Hanksite (light brown) Measurements: 5 x 6 cm Collected: Other - in the collection of Phyllis Richardson Photographer: Phyllis Richardson Info: Single hexagonal crystal of hanksite

© 8/2006

Sample size: 10 X 8 cm Collection and photo: Arliguie M

© Arliguie M

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.

© Rob Lavinsky & irocks.com

A terminated Hanksite crystal, 31 mm across. Photo and collection of Lee Johnson.

© Lee Johnson

7.8 x 5.0 x 4.5 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This strikingly symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The translucent, greenish crystal is complete-all-around and pristine. Hanksite is a soluable mineral and most such ...

© Rob Lavinsky & irocks.com

Fluorescent hanksite from Searles Lake, California. In this photograph, a classic barrel-shaped hanksite crystal fluoresces blue/white under long wave UV light (365 nm). This specimen is also phosphorescent in response to long wave UV. Photograph was taken using a 6 watt, UVP UVGL-58 lamp. This piece is also fluorescent and phosphorescent ...

1.5 x 1.2 x 1.2 cm

© Maggie Wilson

18.6 x 14.7 x 13.8 cm. 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. It is emplaced on matrix with a few smaller hanskite crystals, all of which exhibit matte luster and good translucence with an unusual golden ...

© Rob Lavinsky & irocks.com

8.2 x 5.2 x 4.5 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This strikingly symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The translucent, greenish crystal is complete-all-around and pristine. Hanksite is a soluble mineral and most such ...

© Rob Lavinsky & irocks.com

2.3 x 1.3 x 1.2 cm A classic single floater hanksite crystal from Searles Lake. Hanksite was named in 1885 after Henry G. Hanks in recognition of his service as the first man in California to serve as the state mineralogist. This is a fairly sharp, well-formed, gemmy, doubly terminated, translucent "floater" crystal with typical matte luster ...

© Brian Kosnar - Mineral Classics

A nice translucent gray-green, doubly terminated hanksite crystal showing near textbook hexagonal symmetry. Collected October 1990 by Ed Headley at American Chemical Companies, Searles Lake, California and has not been oiled to slow decomposition. Searles Lake is the type locality for hanksite, but with the permanent end to the Trona Mineral show, ...

© Troy D. Schmidt

6.2 x 3.6 x 3.1 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This strikingly symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The translucent, greenish crystal is complete-all-around and pristine. Hanksite is a soluble mineral and most such ...

© Rob Lavinsky & irocks.com

14x12´5 cm. Crystal of 12x7 cm

Anksite crystal from the type locality. Rui Nunes' specimen and photo, 2005.

© Rui Nunes 2005

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

© Rob Lavinsky & irocks.com

size:6x8cm Paul Bongaerts specimen and photograph

© Paul Bongaerts

Size: 11 x 9 cm Collection and photo: Arliguie M

© Arliguie M

Crystal with 9x7,5x6cm - May of 2002

© Photo & Collection of Martins da Pedra

Colorless to pale amber double-terminated hexagonal prismatic crystal of hanksite. Overall size: 43 x 22 x 22 mm Photo and collection Antonio Borrelli

© Antonio Borrelli

Large crystal of hanksite, 8.1 cm top to bottom. Collection and photograph Norman King.

© Norman King

Big doubly-terminated hexagonal crystal of Hanksite from a classic location Size 94x69mm Photo and coleccion J.A.CENDON

© Julio Alberto CENDON MARTINEZ

Greenish grey (due to clay inclusions) specimen of Hanksite from the Trona Mine, San Bernardino County, California. When unprotected from the air and changes in humidity, Hanksite can get covered by a layer of Trona and Aphthitalite. (See Attachment) Specimen is ~70 x 70 x 55 mm.

RRUFF Project Specimen ID: R050291 Locality: Searles Lake, Trona, San Bernardino County, California, USA Source: Marcus Origlieri Pale yellow hexagonal prism with pyramidal terminations

© Rruff Project

California Hanksite - SW From Searles Lake, CA comes this 4.3" wide specimen of hanksite. Contains: Hanksite (FL Blue Cream >SW) Note: Altered hanksite appears white and does not phosphoresce. Shown under SW light. Obtained from Horste Minerals 7176

© 2011 Cran Cowan

8.2 cm. Complex, interconnected crystals from the collection of David J. Eicher.

© David J. Eicher

Hanksite. Specimen is from the collection of Vince Morgan (1974). Scale at bottom of image is an inch with a rule at one cm.

© Rock Currier

2.7 x 2.1 x 1.8 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This strikingly symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. One termination is pristine and the other is very gently bruised. A snow-white alteration coating has a dramatic ...

© Rob Lavinsky & irocks.com

6 cm crystal. S402-047

© 2009, JGW

Franco Amadori photo. Paolo Franchi collection.

Floater translucent hanksite crystal with alligator skin texture in some faces

© Jose Zendrera

Hanksite cluster.

© Zach Berghorst

California Hanksite - WL From Searles Lake, CA comes this 4.3" wide specimen of hanksite. Contains: Hanksite (FL Blue Cream >SW) Note: Altered hanksite appears white and does not phosphoresce. Shown under white light. Obtained from Horste Minerals 7176

© 2011 Cran Cowan

Size 9x7x6,5cm

9.7 x 7.4 x 7.2 cm. 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 ...

© Rob Lavinsky & irocks.com

11.4 x 9.8 x 8.4 cm. Hanksite is a rare, hexagonal, sulfate carbonate found in lacustrine evaporite deposits. This is a striking, very rare, mounded cabinet nodule of translucent, sharply terminated crystals. The lustrous, greenish crystals are up to 5.0 cm and are included with an unknown material. These superbly symmetrical crystals are from the ...

© Rob Lavinsky & irocks.com

dimension sample cm. 21 x 16 photo and collection Luigi Chiappino

11.4 x 9.8 x 8.4 cm. Hanksite is a rare, hexagonal, sulfate carbonate found in lacustrine evaporite deposits. This is a striking, very rare, mounded cabinet nodule of translucent, sharply terminated crystals. The lustrous, greenish crystals are up to 5.0 cm and are included with an unknown material. These superbly symmetrical crystals are from the ...

© Rob Lavinsky & irocks.com

2.5 x 2.5 x 2.0 cm

© Maggie Wilson

Oiling a 97 pound hanksite specimen

© 2012 Brittany Burkhardt all rights reserved

dimension area mm. 4 x 4 photo and collection Luigi Chiappino

Hanksite. Specimens are from the collection of Vince Morgan (1974). Scale at bottom of image is an inch with a rule at one cm.

© Rock Currier

Hexagonal prismatic floater crystal of hanksite. Photographed by, and in the collection of Dan Costian.

© Dan Costian

This specimen is 4cm along its longest length, and 3cm in diameter.

© Charles Calkins

Single Hanksite crystal, 4cm by 5cm. Collected by Phil Partington. Rolf Luetcke specimen and photo.

8.8 x 6.2 x 5.2 cm. A near floater, this hanksite specimen features several intergrown crystals. It exhibits some luster, an attractive greenish-gray color and fair translucence. 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 ...

© Rob Lavinsky & irocks.com

California Hanksite - Phos From Searles Lake, CA comes this 4.3" wide specimen of hanksite. Contains: Hanksite (FL Blue Cream >SW) Note: Altered hanksite appears white and does not phosphoresce. Shown in phosphorescent state after exposure to SW light. Obtained from Horste Minerals 7176

© 2011 Cran Cowan

dimension sample cm. 5 x 3 photo and collection Luigi Chiappino

Fluorescent hanksite from Searles Lake, California. In this photograph, a classic barrel-shaped hanksite crystal fluoresces blue/white under short wave UV light (254 nm). This specimen is also phosphorescent in response to short wave UV. Photograph was taken using a 6 watt, UVP UVGL-58 lamp. Also see photographs taken under long wave UV and ...

9.1 x 6.6 x 5.9 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This strikingly symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The translucent, greenish crystal is complete-all-around and pristine. Hanksite is a soluble mineral and most such ...

© Rob Lavinsky & irocks.com

4.7 x 4.7 x 3.4 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The translucent, olive-green crystal is complete-all-around and pristine. This dramatic piece is strikingly more flattened, ...

© Rob Lavinsky & irocks.com

5.1 x 3.2 x 2.5 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This strikingly symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The nearly transparent, greenish crystal is complete-all-around and pristine. Hanksite is a soluble mineral and most ...

© Rob Lavinsky & irocks.com

7.4 x 5.9 x 5.2 cm. Hanksite is a very rare, hexagonal, sulfate carbonate found in lacustrine evaporite deposits. This is a striking, very rare, radial nodule of translucent, sharply terminated crystals. The lustrous, greenish, tapered crystals are up to 4.0 cm. These superbly symmetrical crystals are from the Type Locality - Searles Lake in ...

© Rob Lavinsky & irocks.com

A classic barrel-shaped hanksite crystal from Searles Lake, California. This specimen is fluorescent and phosphorescent under both long wave and short wave UV light. This photograph was taken under visible light. Also see photographs taken under short wave and long wave UV light.

6.2 x 5.3 x 4.0 cm. Hanksite is a very rare, hexagonal sulfate carbonate found in lacustrine evaporite deposits. This symmetrical, doubly terminated, floater crystal is from the Type Locality - Searles Lake in California. The translucent, greenish crystal is complete-all-around and pristine. This dramatic piece is strikingly more flattened, than ...

© Rob Lavinsky & irocks.com

Hanksite crystal, 50 mm.

Euhedral Hanksite crystals. Specimen size 7,5x5x5 cm. Bought at Turin Mineral Fair, 2015 in place of a specimen bought at Green's Rock & Lapidary Ltd., Calgary, Alberta, Canada, 2006 and breaked up. :( Photo and collection Alessandro Cantamessa (#1226).

Thumbnail-sized crystal of hanksite from the type locality. Ex Sam Nasser (#SN015).

© Kelly Nash

7.8 x 5.4 x 5.4 cm. This is a single, large, doubly terminated, floater hanksite crystal. It exhibits a matte luster with good translucence and a grayish-yellow color. 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, ...

© Rob Lavinsky & irocks.com

Specimen size: 50 mm. Grzegorz Słowik collection and photo.

© Grzegorz Słowik