Mineral Specimens with Calcite

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t08-51 - Calcite - $ 450
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
small cabinet, 9.3 x 6.9 x 4.5 cm

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This is a new find of lustrous, translucent to transparent calcite crystals: some with overgrowths, others with phantom zoning. These tabular, colorless, calcite crystals to 8 cm across, on a brecciated limestone matrix, are starkly dramatic! It is the short prismatic faces on the edges that are glassy and gemmy so that you can look down through them to the base of the crystal's attachment points, while a slightly frosted or whiter layer of calcite presents on the hexagonal faces. Some minor edge wear to the large crystal is evident, but this specimen and the others in this update are unlike any calcites yet discovered in China and this is of size sufficient for me to not care too much about the slight wear in context, since it has little visual impact. However, I did reduce the valuation accordingly by about 1/3 for it.

t08-52 - Calcite - $ 750
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
cabinet, 14.0 x 10.3 x 6.0 cm

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This matrix specimen of brecciated limestone is host to several large, tabular calcite crystals along with many small ones. the basal hexagonal faces are milky white while the short prismatic faces are glassy and gemmy so that you can look right down into them, presenting an "oreo" effect in ghostly white! The largest of these calcite crystals is 5.5 cm across and they are nearly pristine - seemingly unusual for this find, in a cluster so large (most had MAJOR damage and had to be selected carefully).

t08-53 - Calcite - $ 475
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
cabinet, 14.7 x 9.8 x 7.6 cm

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White on white but with drama you do not often see...This matrix specimen features a large, tabular calcite crystal with milky overgrowths on the basal faces and glassy and gemmy, colorless, short prismatic faces that you can look right down through to the attachment beneath, presenting an "oreo" effect in ghostly white! The largest crystal measures 8.5 cm across, quite a significant size for this find from what I saw at Tucson.

t08-54 - Calcite - $ 400
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
cabinet, 12.1 x 9.0 x 6.4 cm

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A shard of dark gray limestone is the host for a very large calcite crystal which is framed, aesthetically, near the base by a cluster of smaller calcite crystals. The large crystal, 8.75 cm across, is thick, colorless, translucent and lustrous. It has a gemmy and colorless core which was overgrown by a later generation of calcite. Just like the other calcites in this update the short prismatic faces are the gemmiest and the contrast is very striking. Minor bruising on a few edges, and one contact at the lower-right-rear of the major crystal, is insignificant in context given this crystal appears to be the maximal size from the find, from what I saw in Tucson.

t08-55 - Calcite - $ 250
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
cabinet, 11.6 x 7.3 x 4.0 cm

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This matrix specimen features two calcite crystals, one with short prismatic faces and the other with much longer prismatic faces. Both crystals are colorless with good translucence, and gemmy prism faces. They also exhibit overgrowths milky overgrowths on the basal faces and glassy and gemmy, colorless, short prismatic faces that you can look right down through to the attachment beneath, presenting an "oreo" effect in ghostly white! The larger, almost equant crystal measures 3.0 cm in length. This specimen offers a nice contrast in crystal growth and lots of angles to peer into the crystal cores.

t08-56 - Calcite - $ 475
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
small cabinet, 8.3 x 7.8 x 7.3 cm

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This superb, aesthetic cluster of calcite crystals on matrix features crystals like an "oreo " sandwich where the two basal faces are colored white at their very edges and the short prismatic faces between them are glassy and gemmy and colorless, so tha tyou can look inside down to the matrix underneath! The larger crystal measures 5.0 cm across. This is overall a very elegant combination of crystals on sparing matrix, and one of my favorites here.

t08-57 - Calcite - $ 750
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
small cabinet, 8.3 x 6.8 x 5.4 cm

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A sliver of matrix is the host for four, intergrown crystals of calcite, to 4.5 cm across, splaying out from the core. This aesthetic arrangement features lustrous, translucent, colorless crystals, all with the characteristic overgrowths near the terminal hexagonal faces, contrasting with gemmy and glassy, short prismatic faces that you look through into the crystal from the edges. Very sharp and geometric!

t08-58 - Calcite - $ 750
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
small cabinet, 7.3 x 4.7 x 3.8 cm

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This specimen features a nearly pristine, large calcite crystal, 7.3 cm across. The two basal faces have zones of ghostly white color in stark contrast to the short prismatic faces between them being glassy, gemmy and colorless. Unlike most of the others here, however, there are more gemmy clear areas to the side hexagonal faces, as you can see. Adding to the beauty and form of this specimen, is a small cluster of white calcite crystals at the base of the larger one. Looking down the gemmy prism faces, one can see all the way through 4cm or so to the bottom of the crystal and the slight bit of attached matrix underneath!

t08-59 - Calcite - $ 1250
Near Daye, Hubei Province, China
cabinet, 13.1 x 9.0 x 5.6 cm

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I believe this is the finest of these rare and unusual calcites for outright quality, in this update. The large crystal, 7.25 cm across, is extremely thin compared to its length and more gracile than others above. It is mostly a ghostly white color on the two basal hexagonal terminations which frame glassy and gemmy, colorless, short prismatic faces between them like an oreo sandwich. In addition, this magnificent large crystal is wreathed by many smaller white calcite crystals with no well-formed spacing between the flat sides (i.e. truncated prism faces), like sharp flat discs setting off the fatter crystal in their midst, all of which makes the specimen more elegant as a whole.

t08-60 - Calcite - $ 750
Near Daye, Hubei Province, China
small cabinet, 8.5 x 6.5 x 6.1 cm

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This is another superb calcite specimen, that features a large calcite crystal, 7 cm across, with two, white basal terminations that sandwich a prismatic termination that is glassy, gemmy, and colorless so that you can look deep into the crystal through it. It is usually hard to photo this effect but these prism windows are so clear here, you can see in one photo that you are looking through the 4-cm-deep crystal right to the matrix underneath it! Smaller, white calcite crystals, like flattened disc with no prism faces, wreathe the base of this specimen. Side and back views are shown. Aesthetic!

t08-62 - Calcite - $ 1250
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
small cabinet, 7.1 x 4.3 x 1.3 cm

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This single crystal of calcite has a lot going for it, and is unique amongst the pieces I was able to acquire. The core of the crystal is gemmy and colorless. The color then turns milky white but, near the termination are several layers of zoned colorless areas. The two edge hex faces sandwich glassy, gemmy, colorless, short prismatic faces which are so gemmy you can look right into , down, and through this crysatl from top to bottom. It is complete on both sides as you can see from the front and back views (sticker indicates the back side, to my eye, which has a slight matrix attachment). Very neat crystal!!

t08-63 - Calcite - SOLD
near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China
miniature, 5.6 x 4.2 x 2.1 cm

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Calcite from near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China [db_pics/pics/t08-63a.jpg]

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Calcite from near Daye, Daye Co., Huangshi Prefecture, Hubei Province, China [db_pics/pics/t08-63b.jpg]

Withfaint zoning, two hexagon-shaped basal terminations on either side frame the short prismatic, glassy, gemmy, colorless terminations between - they are so clear that you can look right down through them, into the crystal and to its bottom! Definitely this is the most fat and tabular crystal of the lot here !

T08-88 - Parisite-(Ce) on Calcite - $ 2150
Mina La Pita, Muzo, near Maripi, Boyaca Province, Colombia
miniature, 5.1 x 3.6 x 2.7 cm

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This is a beautiful, colorful (unusually so!) crystal measuring 1.4 cm, ensconced in a protected vug of crystallized calcite within massive calcite. One so rarely sees parisite on crystallized matrix from any locality, and the contrast to these calcites really addds a lot, visually, to the desirability of the piece. Parisite today comes from both France and Malawi, and especially Zagi Mountain in Pakistan, in excellent crystals. But, they are all of markedly different habit from these classic, and oldest good examples of the species from Muzo. Believe it or not, Muzo was actually the type locality back in the early 1900s, in fact! Other locales known today produce gemmier or bigger examples, but for the overall combination of qualities you would want most, and for good matrix, this locality is still the most desirable. I have handled several over the years of some stature form here, and among them I find this one ranks highly. Ironically, for your money, you get a better parisite than you would an emerald from the locality, for this price!

T5008 - Rhodonite on Calcite - SOLD
Franklin Mine, Sussex County, New Jersey, USA
thumbnail, 2.5 x 2 x 1.3 cm

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Rhodonite on Calcite from Franklin Mine, Sussex County, New Jersey, USA [db_pics/pics/t5008a.jpg]

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Rhodonite on Calcite from Franklin Mine, Sussex County, New Jersey, USA [db_pics/pics/t5008b.jpg]

Really good, unusually sharp, translucent crystals of classic Franklin rhodonite, embedded in contrasting matrix. This is a great thumbnail example - most specimens are big and clunky in comparison and good thumbs are especially hard to obtain. Beyond that, though, these crystals are very fine.

T5044 - Calcite on Fluorite - SOLD
Nancy Hanks Claim, Mesa Co., Colorado, USA
cabinet, 10.4 x 6.4 x 3.5 cm

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A VERY rich and colorful specimen of green fluorite completely covering a knoll of matrix! On top of it are perched elongated crystals of calcite. This is a huge and showy locality specimen, and is the best I have seen for sale from the locality! BETTER IN PERSON!

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Rob Lavinsky, rob@irocks.com

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