The Danburite crystal weighs 83 carats (16+grams) and the cut Danburite oval weighs 7.20 carats. Danburite crystals are notoriously damaged, and finding a sizeable one with no dings and some clarity is remarkably difficult. Danburite has a hardness of 7 - 7.5, and has a higher refractory index than a diamond, so as a cut stone it is quite sparkly. It is a Calcium Borosilicate, and it is taken out of a zinc mine by enterprising Mexican miners. Lately production has been very poor, with primarily "lechosa," or "milky" crystals being found. The entire chizel shaped termination is pristine. There is some side damage on the piece, but the clarity and intact termination makes up for that. I got the cut stone out of an old collection, it was facetted around 20 years ago. the price was right, so I'm passing it along. The two pics show the front and back of the crystal. 

ADAMITE6 - Adamite on Limonite
$ 195.00
Ojuela Mine, Mapimi, Durango, Mexico
cabinet - 11 x 7 x 5.5 cm

There are layers of horizontal Limonite "stacked," on itself, with yellow Adamite crystals "inhabiting," the space between each layer. Some are exending out, while most are tucked away inside. There are layers of micro-adamites forming a druzy layer on some layers of Limonite. What's also cool is this piece fluoresces like mad, turning a neon green under long wave ultraviolet light. This piece was mined in the autumn of 2008, when a prolonged drought made the water level within the Ojuela mine drop to expose the Adamite level. These levels had faced flooding since the late 1970's. Since then, these same levels have not been reached and production has been virtually nil. There is a partial Adamite crystal in the middle of the piece, and one ofn the far side (let's say 32 intact and two partials). Quite interesting for its layered characteristics. 

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(click on the pictures to enlarge)

WULFENITE3 - Wulfenite
$ 225.00
Wulfenite from Villa Ahumada, Sierra de Los Lamentos, Chihuahua, Mexico
miniature - 4.5 x 3.5 x 1.3 cm

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AZURITE7 - Azurite w/ Malachite
$ 275.00 NET
Milpillas Mine, Sonora, Mexico
miniature - 3 x 2.7 x 2.6 cm

Millpillas has produced some amazing crystals over the last 4 or 5 years. Word is that they are finished with the oxidation zone, and are not finding Azurites anymore. I got this piece through a trade. The crystals are sharp, the color is rich and the luster is bright. Also the crystals are pristine without damage, which is so difficult to find from this location. The Malachite jumps in contrast to the blue Azurite. 

 

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(click on the pictures to enlarge)

DANBURITE6 - Danburite rough and cut
$ 375.00 NET
San Luis Potosi, Mexico
small cabinet - 5.5 x 2.5 x 1.9 cm

Danburite is found in a Tin Mine in Mexico. The miners that bring them out are apparently quite rough with them, as 98% of all the crystals are dinged. The crystal's termination is pristine, overall it is in good shape. It is roughly thumb size. It has a light pink cast to it.

The stone was faceted by Michael Davis, a well known american cutter. It weighs over 12.5 carats, it is a clean (flawless) stone that is extraordinarily bright due to its emerald cushion cut, and the fact that Danburite has a higher refractory index than diamond. I find good danburite rough once every few years, then I give it to Mike to cut beautiful stones. I then find a matching crystal that is in good condition. The stone would retail for between $40 and $60 per carat ($625 value).

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(click on the picture to enlarge)

ADAMITE8 - Adamite on Limonite
$ 295.00
Ojuela Mine, Mapimi, Durango, Mexico
cabinet - 10 x 9 x 9 cm

The Ojuela Mine is perhaps the most classsic well known mine in Mexico. Adamite was found here in the 1970's and again around 2009 when water levels dropped to reveal the levels where Adamite formed. This piece shows bright yellow acicular crystals forming inside a vug in the Limonite. The sprays average 1.5 cm long. An attractive specimen.

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(click on the pictures to enlarge)

OPAL14 - Opal var. Hyalite
$ 135.00
San Luis Potosi, Mexico
small cabinet - 5.3 x 5 x 2.3 cm

This opal has a beautiful contrast of clear internal characteristics, and orange and red highlights within the piece. The clear areas will fluoresce green under short wave. The red/orange areas do not fluoresce as the iron quenches the fluorescence.  It has a range of different sized boytroidal bubbles, and a nice depth within the stone. No damage.