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7 specimens listed
Page   1 |

Datolite (color change) and Heulandite
stock #8.1-208
Prospect Park Quarry, Prospect Park, Passaic County
New Jersey, United States
5.1 x 3.2 x 2.8 CM (small cabinet/ large miniature)
price: $250
Spring 2020

Datolite with a strong color change from artificial to daylight, the color goes from a dark olive-green to a yellow-grey. From a remarkable pocket at the classic Prospect Park Quarry locality in 2008, there were not many pieces found. This has contrasting Huelandites with a warm brown color and shows the uncommon color change phenomenon very well. The Datolite is transparent with many faces being very glassy. There is contacting and bruising that can be hidden fairly well by display angle, so not for perfectionists. Overall the condition is equal to the best I have seen from this find, and a cute Northeastern USA oddity.
Datolite, Sphalerite and Cumberland habit Quartz
stock #20.1-FC-135
Dalnegorsk, Kavalerovo Mining District
Primorsky Kray, Far Eastern Region, Russia
7.8 x 4.2 x 4.1 CM (cabinet)
price: $1100


Gem clear Datolite crystals up to 2.3 CM are complexly mingled with doubly terminated "Cumberland habit" Quartz and clusters of very sharp twinned Sphalerites. It is possible to see greenish inclusions inside some Datolites. This is a rich, undamaged multi specie specimen from Dalnegorsk, that is especially fine in person. The more this piece is examined the more remarkable details are seen. There are many good Dalnegorsk specimens available in all price ranges, this is especially fine and well worth the cost for a superior specimen.
Datolite
stock #15.1-413
Verhniy mine, Dalngorsk
Primorsky Kray, Far Eastern Region, Russia
6.5 x 6.3 x 4.4 CM (cabinet)
price: $330
Post Tucson 2015

An attractive, fine specimen of older Dalngorsk Datolites. Transparent lustrous crystals with orange-brown phantoms in greenish prisms cover the matrix in an esthetic arrangement. Individual crystals are up to 2.9 CM, this sort of Datolite was rare when first found, and has not been available for several year.
Datolite
stock #AX-29-059
Charcas
San Luis Potosi, Mexico
6.4 x 6 x 3 CM (cabinet)
price: $275
pre Tucson 2015 update

Great color and luster, this is a Datolite from Mexico that looks much more like a good Russian specimen. From a small find in late 2013, this has the form, clarity and quality of the top few percent. Some edge chipping/ contacts is inevitable but overall in very good condition.
Datolite (faceted stone and rough crystal)
stock #JY-001
Lane Quarry Westfield
Massachusetts, United States
Crystal 2.3 x 1.9 CM, Stone 8x8 MM, 1.6 Carats (thumbnail)
price: $260
Spring 2013

A classic old locality! This is quite a nice and rare combo, from the Lane Quarry in Massachusetts. Cut and rough combo with a fine faceted stone of light yellow color and excellent clarity. Datolite is a rare gemstone and it is difficult to cut as the hardness varies in different orientations, but when done well they are brilliant! Datolites can have a dispersion greater than diamond. The crystal is bright, sharp and un-dinged on the display side, contacted on back and broken on the base, it displays well. Very uncommon to see a Massachusetts Datolite combo like this!
Datolite on Prehnite (optical grade gem crystals)
stock #JY-002
Lane Quarry Westfield
Massachusetts, United States
10.6 x 6.7 CM (cabinet)
price: $725
Tucson group

Impressive and a Northeastern US classic! Sharp, clear and bright gemmy Datolites up to 2.4 CM with selective faces colored a nice cognac hue sit on a contrasting green Prehnite. As esthetic as you can find, the main crystals are in perfect condition but non detracting damage is noted on a few smaller crystals and at the edges. Despite this it displays very well and is a striking specimen from this old locale.
Datolite-color change & Heulandite
stock #8.1-208
Prospect Park Quarry, Prospect Park, Passaic County
New Jersey, United States
5.0 x 3.1 CM (miniature)
price: $95
Spring 2013

The yellow to green color change occurs between incandescent, flourescent and daylight. Lusterous crystals the largest measuring 2.9 CM with contact on the bottom of the crystal. From a 2009 find.
7 specimens listed
Page   1 |