Trona

The specimen was photographed upside down, as the fine-grained upper crust is much less fragile than the base. Collected as a fresh block dripping with brine (similar to this), it represents a single season of trona growth after wet-season flooding of the lake. Collected in 1986, over the years the specimen has lost its transparency and is now ...

© Tony Peterson

A sharp, terminated individual crystal of trona. Acquired from Richard Tayler Jason Evans collection

© Jason J. Evans

Trona is an uncommon evaporative carbonate species (the name is actually a Swedish term, but was derived from the Arabic world "natrum" meaning native salt). Some of the best known examples ever found are those from Owens Lake in California, where halite is not terribly common. This piece is from a new find, collected by a good friend of ours that ...

© Brian Kosnar - Mineral Classics

Up to 5 cm long prismatic trona xls from Owens Lake, Inyo Co, California, USA. Overall specimen size is 10 x 5 x 6 Photo and collection : Thomas Krassmann

© Thomas Krassmann

Trona is a naturally occurring mineral that is chemically known as sodium sesquircarbonate, the raw material for soda ash. Fluoresces bright greenish -yellow under a blacklight...Total size: 4" x 2" x 2"

© 2005 - Joe Kienle - Some Rights Reserved

Picture width is 60mm. Nice specimen of pink Trona crystals. Color comes from microorganic inclusions.

© Elmar Lackner 2007

trona. size: 70x60 mm. photo: 07-31-2009. Thomas Krassmann Collection

© Philip Bluemner

Very nice 4 mm crystals of trona. The white spheres on the rigt one are burkeite. Lit.: Rivista Mineralogica Italiana, 2009 nr 4. Collected by Marco Marchesini. Photo and collection: Paul Mestrom

© pmestrom@home.nl

Trona pseudomorph after halite. Some of the halite is still visible under what it seems a thick trona coating. Fluorescent white under longwave UV light with long lasting green, almost yellow, phosphorescence. Longwave fluorescence.

© Simone Conti

Single crystal, 4cm long.

© Elijah Fayerman

7 cm specimen of trona crystals, UV SW illumination. S402-339A Excalibur Mineral Company specimen.

© 2010, JGW

Geminato entirety The whole 11 mm Specimen and photo by Enrico Bonacina

© Enrico Bonacina

Cluster of trona crystals. Specimen 10.5 cm in length. Collection and photograph Norman King.

© Norman King

Tabular crystal size 0.4 mm Collection and photo Roberto Bosi

© Roberto Bosi

Tan-yellow Trona blades with possibly white Halite.

Trona crystals on matrix, fluorescent and phosphorescent white under longwave UV light. The matrix also fluoresces some kind of orange, not sure what it is. Longwave fluorescence.

© Simone Conti

Canon 5D mk III, Zeiss Mikrotar (Luminar) 40 mm 1 : 4.5 with bellow. Stacking with Wemacro.

© Hans van t Zelfde

Parallel crystal aggregate of white trona. Has old label from J.S. Frankenfeld (Philadelphia). Ex. Robert C. Linck (1905-1970). Overall size of mineral specimen: 6x4x2 cm. Size of individual crystals: 4 cm.

© 2003 John H. Betts

Freshly broken trona crust on the surface of Lake Magadi, Kenya, in July 1985. Lake Magadi is a closed basin saline lake on the floor of the Kenya Rift valley. The red color is caused by an algae which, when eaten by flamingos, turns their feathers bright pink. Digitized 1985 transparency.

© Tony Peterson

Large specimen approx 30cm across. Victor Yount specimen.

© J.Ralph 2008

Large (25cm) group of Trona crystals. Luca Bertelli specimen, Munich Show 2009.

© J.Ralph 2009

A block of trona, about 5 inches high, cut from the surface of Lake Magadi, 1986. The block is saturated with brine. Pink and green colors are due to algae. Kenya 1 shilling coin for scale. A similar block was retrieved and is in my collection. Over thirty years later, this sample has begun to dehydrate and crumble.

© Tony Peterson

Trona infilling the footprints of flamingoes on the muddy eastern shore of Lake Natron, Tanzania, at the foot of Shombole volcano, a stone's throw south of the Kenya border (1986). Kenya shilling for scale. Digitized transparency.

© Tony Peterson

This specimen measures 2x1.25x1 cm.

© Charles Calkins

Block of trona broken by the dredge (background) which collects material for the mine at Lake Magadi (1985). At least two years worth of deposition are recorded in this block.

© Tony Peterson

Trona is a naturally occurring mineral that is chemically known as sodium sesquircarbonate, the raw material for soda ash. Fluoresces bright greenish -yellow under a blacklight...Total size: 4"

© 2008 - Joe Kienle - Some Rights Reserved

Coarse-granular agregate of colourles, partialy transparent trona from cavities of axial part of the pegmatite. Associating minerals are secondary soda minerals (thermonatrite etc.). Specimen size is 5.5x3.2 cm. Collected by Victor Grishin. Pavel M. Kartashov collection and photo.

© Pavel M. Kartashov collection & photo

7 cm specimen of trona crystals, UV LW illumination. S402-338A Excalibur Mineral Company specimen.

© 2010, JGW

Crystal aggregate of "caramel" Trona 7,4 x 4,9 cm. Small upper right image shows fluorescence under UV LW 8 w light. Photo and collection Pedro González. Equipment Olympus E-500.

© Pedro González

10.8 x 8.6 x 5.2 cm. From Owens dry lake in California, this cluster of trona, a hydrated sodium, hydrogen, carbonate, occurs in large, golden crystals to 4.5 cm in length. From a major find by John Seibel at a small mine out there, acknowledged to have produced best of species, in the late-1990s. Ex. Martin Zinn Collection.

© Rob Lavinsky & irocks.com

Picture width is 18mm. Nice specimen of pink Trona crystals. Color comes from microorganic inclusions.

© Elmar Lackner 2007

RRUFF Project Specimen ID: R050228 Locality: Stauffer mine, Green River, Wyoming, USA Source: Marcus Origlieri Aggregate of pale yellowish brown flattened crystals

© Rruff Project

RRUFF Project Specimen ID: R050499 Locality: Searles Lake, Trona, San Bernardino County, California, USA Source: California Institute of Technology W-20820 Gray columnar massive

© Rruff Project

Picture width is 12mm. Nice specimen of pink Trona crystals. Color comes from microorganic inclusions.

© Elmar Lackner 2007

A 9x6x6 cm superb crystal group of Trona from Owens Lake, Inyo Co., California. This specimen comes from a small lot of what are easily the finest examples of the species I am aware of.

© C. Stefano '11

The image is of some loose fibrous crystals on the “crusty”side of a sample of lakebed chert from Lake Magadi. A old reconnaissance SEM analysis of the crust was dominated by Na-Si and I assumed that minerals such as magadiite were present. However, a more detailed study (child photos) shows that the fibers are long blades of trona adhering ...

© Tony Peterson

Trona aggregate of parallel transparent crystals - Ex Marco Marchesini, April 2005 - Coin diameter 15 mm

© Dott. Geol. Marco Barsanti - geoman1@tin.it

Trona (identified by powder XRD) - snow-white powdery aggregate on surface nummulitic limestone. FOV 5x5 cm. Selfcollected in 2004. A. Tischenko collection (#1243) and photo.

Trona aggregate of parallel transparent or weakly pink crystals - Ex Marco Marchesini, April 2005 - Coin diameter 15 mm

© Dott. Geol. Marco Barsanti - geoman1@tin.it

9.7 cm. Yellow-white crystals on matrix from the collection of David J. Eicher.

14.4 x 10.8 x 7.8 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find. Ex. Karl Faddis Collection.

© Rob Lavinsky & irocks.com

dimension sample cm. 9 x 5 photo and collection Luigi Chiappino

Light caramel colored Trona, massive and crystalline. Fluoresces in a yellow color under SW and LW UV (brighter). LW response shown. ex Gary Weinstein

© Mathauser

Trona crystals from Kilimanjaro area Collection and photo: Arliguie M

A bottle of trona pieces. These bottles were used as corporate gifts. Rick Dalrymple Specimen & Photo.

© Rockpick Legend Co. & Rick Dalrymple

dimension sample cm. 7 x 5 photo and collection Luigi Chiappino

Honey-brown colored Trona, fluorescent in a yellow color under LW and SW UV. LW response shown ex Robert E. Jenkins collection #6431, ex David M. Shannon #45a November 1979

© Mathauser

A single crystal of trona. The scale at the bottom of the image is an inch with a rule at one cm.

© Rock Currier

The image is of some loose fibrous crystals on the “crusty”side of a sample of lakebed chert from Lake Magadi. A old reconnaissance SEM analysis of the crust was dominated by Na-Si and I assumed that minerals such as magadiite were present. However, a more detailed study (child photos) shows that the fibers are long blades of trona adhering ...

© Tony Peterson

Specimen in the University of Wyoming collection

FOV 4 x 4 mm Collection and photo Roberto Bosi

© Roberto Bosi

14.4 x 10.8 x 7.8 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find. Ex. Karl Faddis Collection.

© Rob Lavinsky & irocks.com

Trona crystals. Rick Dalrymple specimen & photo.

© Rockpick Legend Co. & Rick Dalrymple

Small needles of trona. Rick Dalrymple specimen & photo.

© Rockpick Legend Co. & Rick Dalrymple

The image is of some loose fibrous crystals on the “crusty”side of a sample of lakebed chert from Lake Magadi. A old reconnaissance SEM analysis of the crust was dominated by Na-Si and I assumed that minerals such as magadiite were present. However, a more detailed study (child photos) shows that the fibers are long blades of trona adhering ...

© Tony Peterson

Colorless, crystalline trona with white nahcolite. Former Jaroslav Hyrsl collection. Rolf Luetcke specimen and photo.

14.4 x 10.8 x 7.8 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find. Ex. Karl Faddis Collection.

© Rob Lavinsky & irocks.com

The image is of some loose fibrous crystals on the “crusty”side of a sample of lakebed chert from Lake Magadi. A old reconnaissance SEM analysis of the crust was dominated by Na-Si and I assumed that minerals such as magadiite were present. However, a more detailed study (child photos) shows that the fibers are long blades of trona adhering ...

© Tony Peterson

SEM backscattered electron image of relatively stout trona blades, adhering to microcrystalline silica (bright). Loose crystals on carbon tape.

© Tony Peterson

Closeup of the base of the specimen, where trona grew in sprays parallel to bedding. Collected in 1986, over the years the specimen has lost its transparency and is now becoming very fragile.

© Tony Peterson

Honey-brown colored Trona, fluorescent in a yellow color under LW and SW UV. SW response shown ex Robert E. Jenkins collection #6431, ex David M. Shannon #45a November 1979

© Mathauser

9.4 x 8.0 x 6.4 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, 360-degree example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These ...

© Rob Lavinsky & irocks.com

12.3 x 7.8 x 7.4 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't ...

© Rob Lavinsky & irocks.com

Backscattered electron image of loose trona blades on carbon tape.

© Tony Peterson

Striated gemmy crystal of trona. Photographed by, and in the collection of Dan Costian.

© Dan Costian

9.9 x 9.7 x 5.5 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't ...

© Rob Lavinsky & irocks.com

9.4 x 9.2 x 4.8 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't been on ...

© Rob Lavinsky & irocks.com

9.4 x 9.2 x 4.8 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't been on ...

© Rob Lavinsky & irocks.com

12.3 x 7.8 x 7.4 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't ...

© Rob Lavinsky & irocks.com

Light caramel colored Trona, massive and crystalline. Fluoresces in a yellow color under SW and LW UV (brighter). LW response shown. ex Gary Weinstein

© Mathauser

12.3 x 7.8 x 7.4 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't ...

© Rob Lavinsky & irocks.com

9.4 x 9.2 x 4.8 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't been on ...

© Rob Lavinsky & irocks.com

9.9 x 9.7 x 5.5 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, large example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These haven't ...

© Rob Lavinsky & irocks.com

11.9 x 10.0 x 6.4 cm. Trona is a hydrated sodium hydrogen carbonate found in extremely arid areas. On this specimen, lustrous and translucent, light amber colored trona crystals, to 4.3 cm in length, are intergrown on matrix. From a late 1990s find, these are superb for the species. They will decay in humid climates.

© Rob Lavinsky & irocks.com

9.4 x 8.0 x 6.4 cm. Trona is a rare carbonate found in saline lakes and their evaporites. This is a superb, 360-degree example of sugary, translucent, honey-brown crystals of large size. Such specimens from this locale are considered to be the finest examples of the species. From a small find collected by George Seibel in the late 1990s. These ...

© Rob Lavinsky & irocks.com