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Mineral Specimens with Colemanite
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ex. Al Ordway
This is a fascinating miniature of colemanite with two lustrous and translucent, bicolored crystals to 3 cm in length.The crystals exhibit a dark amber color at their terminations with an ivory color in the center. In addition, the largest crystal is also doubly terminated.
ex. Scott Kleine
Sharp xls to 2 cm make this the most dramatic example for the find, because this is the largest crystal I know of to date! The twinning is SHARP and well-developed, much more easily visible because of the size of the crystal. Three other large crystals, to over 1 cm, flank the big one's rear. I like the look of it as a castle or mountain with smaller peaks winding elegantly down the center-right of the piece. The effect is gorgeous in person! I think, given how unique the piece is amongst 200 or so specimens from this pocket, that its quality should stand the test of time and set it above others of the find (from late 2005). Most importantly from the collectors point of view, they are unusually pretty as previous colemanites have generally been white to chalky in color, with few exceptions as a rule. Moreover, and even more interesting, these specimens are composed of twinned crystals which have really sharp and interesting intersections resulting in complex crysatllography. Lastly, they fluoresce in an interesting pattern with yellow or white zones at those intersections.
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Rob Lavinsky, rob@irocks.com
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share specimen![Colemanite from Thompson Shaft, Furnace Creek Wash, Ryan, Inyo Co., California, USA [db_pics/new2012/ORD85a.jpg]](db_pics/new2012/ORD85a.jpg)
![Colemanite from Thompson Shaft, Furnace Creek Wash, Ryan, Inyo Co., California, USA [db_pics/new2012/ORD85c.jpg]](db_pics/new2012/ORD85c.jpg)
![Colemanite from Thompson Shaft, Furnace Creek Wash, Ryan, Inyo Co., California, USA [db_pics/new2012/ORD85d.jpg]](db_pics/new2012/ORD85d.jpg)
![Colemanite (twinned) from FLUORESCENT [db_pics/pics/t07-114a.jpg]](db_pics/pics/t07-114a.jpg)
![Colemanite (twinned) from FLUORESCENT [db_pics/pics/t07-114b.jpg]](db_pics/pics/t07-114b.jpg)