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158 specimens listed
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Spinel
stock #21.1-061
Parker Mine, Laurentides
Quebec, Canada
3.3 x 2.8 x 1.7 CM (thumbnail)
price: $110
Spring 23

A sharp and lustrous Spinel octahedron is perched on a matrix shard. In excellent condition, the Spinel has distinct edge and corner modifications and is well exposed from the enclosing rock. This is from the Parker Mine in Québec which was a Mica mine and was at one time the source of fine Spinel crystals in Feldspar like this example.

Grossular - gem crystals on matrix
stock #19.1-590
Jeffrey Mine, Asbestos (now Val-des-Sources, Estrie,
Quebec, Canada
5.6 x 5.3 x 2.9 CM (cabinet)
price: $1900
Spring 23

Excellent gem clear Garnet crystals on contrasting matrix from the famed Jeffrey Mine. One of the most desirable (and rare) sorts of Grossular are the isolated crystals on dark matrix. These crystals are unusually well-isolated, the two that do touch are just barely in contact. Usually the crystals are tightly clustered and incomplete. The crystals themselves have the well-defined striations and lustrous faces that have made these world class Garnets and highly prized. Ex Martell collection (old collection number is painted on the underside). It is very unusual too that some Jeffrey Garnets are known to be fluorescent, usually just a few percent of the pink or green colors react. This piece however is also Fluorescent, a pink-red color which is very rare in the orange colored Garnets from Jeffrey or from anyplace in the world. Choice.

Grossular - frog-egg type
stock #17.1-462
Jeffrey Mine, Asbestos (now Val-des-Sources, Estrie,
Quebec, Canada
4 x 3.5 x 2.2 CM (miniature)
price: $380
Spring 23

One of the most desirable and rare types of Grossular from the Jeffrey Mine are the frog-egg type. This specimen is a matrix of tiny Diopside crystals that hold several gem clear Garnets. Some of these are frog egg type with the colorless exterior and a bright green interior zone, much like frog eggs. The crystals are in excellent condition, very sharp and bright but small, with the largest just 2-3 MM in size. Despite the small size, the color is vivid enough to show the crystals to the naked eye. There is some fluorescence as well which is noted from some of the green Jeffrey Garnets. Very unusual to find a clean specimen in this price range now.

Analcime on Natrolite etc.
stock #17.1-455
Poudrette Quarry, Mont Saint-Hilaire
Quebec, Canada
5.8 x 4.7 x 3.8 CM (cabinet)
price: $320
Fall 22

A classic from the famed Mont Saint-Hilaire which is perhaps the world's most important Alkaline Pegmatite. This locality has so many outstanding and unusual combinations of minerals. This specimen features a 3.4 CM diameter Analcime crystal that is sharp, glassy and complete. This rests on several other minerals perhaps the most prominent are Natrolites some of which have pseudomorphed after an earlier mineral. A nice example of Saint-Hilaire Alkalai minerals.

Vesuvianite - classic multi-color crystals
stock #14.1-046
Jeffrey Mine, Asbestos (now Val-des-Sources, Estrie,
Quebec, Canada
4.1 x 2.3 x 1.5 CM (miniature)
price: $1750
Fall 22

Vesuvianite crystals with green outer areas and rose to violet middles. Very lustrous, glassy and well-formed, the crystals are in parallel position and show a cascade of termination faces. In outstanding condition, no visible damage, the crystals are translucent and will glow with backlighting. This looks fine on all sides. From a find over 20 years ago at the famed Jeffrey Mine which had been the source of the world's best Vesuvianite. The mine has been closed for many years and nothing will ever again be produced again. Even though Vesuvianite is not a very rare mineral, these vivid colors and forms do not exist anyplace else on earth. Fine specimens from these unique finds at Jeffrey have become very hard to find, especially in this quality and condition.

Diopside with minor Calcite
stock #22.1-450
Miller Property, Sebastopol, Renfrew County
Ontario, Canada
5.4 x 2.9 x 2.7 CM (cabinet)
price: $320
Fall 22

A super well-formed Diopside ex. John Rodger Mitchell collection. From the prolific and incredible Skarn deposits of the Renfrew area in Ontario, this is an exceptionally choice specimen with a deep oil-green color and wet luster. A smaller side crystal is also well terminated but is contacted and incomplete on the bottom end. Overall this is in very good condition as seen, far better than any other examples we have come across. A pretty Pyroxene example that is on textbook form and not a typical Grenville grundge type piece, this is display worthy!

Grossular - frog-egg type, green cores
stock #22.1-435
Jeffrey Mine, Asbestos (now Val-des-Sources, Estrie,
Quebec, Canada
4.2 x 2.6 x 2.3 CM (miniature)
price: $525
Fall 22

Glassy transparent pink color Garnets with emerald green cores on matrix. One of the great treasures found decades ago at the long gone Jeffrey Mine (Asbestos, Quebec) these are modern classics. Very hard to find now in any quality today on the market this piece has excellent luster and several clustered grossular crystals that are complete. Some edge damage exists but the important crystals are fine. Despite the "clustering" the individual crystals are still defined and very bright. For any suite of Garnets these are a must, this habit has never been found anyplace else on earth and there were not many found back then. "Frog-Egg" Garnets are usually very expensive, this piece offers very good value for cost.

Grossular - gemmy crystals with minor Diopside
stock #12.1-175
Jeffrey Mine, Asbestos (now Val-des-Sources, Estrie,
Quebec, Canada
4.3 x 2.4 x 1.6 CM (miniature)
price: $340
Post Tucson 2022

Gem clear Garnets with glassy faces with vivid color and deep striations. The individual crystals are up to 1.3 CM across and contrast with the matrix. In excellent condition as seen, this is from the famed Jeffrey Mine, a modern classic locality that was at one time the source of the world's very best Grossular. Since the mine has been closed these have become much more prized, this miniature piece has a strong display impact that stands out.