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8 specimens listed
Page   1 |

Bournonite on Pyrite with Quartz
stock #20.1-131
Trepka Complex, Trepka Valley
Kosovska Mitrovica, Kosovo
6.6 x 3.8 x 3.6 CM (cabinet)
price: $420
Spring 2020

We see very few Bournonites from Trepka and almost never of good esthetics. This is a very pretty specimen with the best quality we have ever seen. The most prominent Bournonite crystal is perfect, undamaged 1.4 CM in diameter and has bright metallic luster. It is a textbook quality twin with cogswheel form on the edges. The whole piece has choice contrast with brilliant Pyrite forming most of the matrix. Trepka has been known as an excellent source of other Sulphides. This new find was small but had impressive Bournonites which is certainly newsworthy and exciting.
Bournonite, Quartz and Pyrite
stock #AX-10-906
Pachapaqui District, Bolognesi Province
Ancash Department, Peru
7.2 x 5.4 x 5.2 CM (cabinet)
price: $280
Late Summer 2018

Two-sided specimen with excellent sharp Bournonites on both sides. All the Bournonites show bright silver luster and twinning that in some crystals has the classic cogswheel habit. The side I consider the "front" or better display side has two main Bournonites that are perfectly formed and undamaged, set off by golden Pyrite and milky Quartz crystals. The "back" side has more nice Bournonites but there is some damage and contacts, (that is why it is the back of course). A few years ago matrix Bournonites of this quality were very rare and expensive when available but both China and Peru then began to produce these and they became very affordable. Now both these sources are not producing.
Bournonite- Classic locale, twinned crystal
stock #18.1-061
Pribam
Central Bohemia Region, Czech Republic
6.7 x 4.7 x 3.9 CM (cabinet)
price: $550
Worldwide mix summer

A well exposed Bournonite with complex twinning sits well exposed on a sulphide matrix with Dolomite crystals. Ex Charles Noll collection, this is a choice, old specimen from the classic locale of Pribram. The central crystal is 2.6 CM across., and has a few small Quartz crystals scattered on it. In unusually good condition as seen, the surface is also lustrous and has a fine patina.
Bournonite on Quartz
stock #8.1-250
Yaogangxian Mine, Yizhang County, Chenzhou Pref.
Hunan Province, China
8.8 x 4 x 3.2 CM (cabinet)
price: $280
new june 17

A lustrous Bournonite is perched on one end of a doubly-terminated Quartz crystal from Yaogangxian. Remarkably, the entire specimen is fully crystallized and complete on all sides, it is a floater. A modern classic specimen- vintage 2004, the great era of Yaogangxian production. The Bournonite has well defined crystal faces on the front side, however the back side is less distinct, more complex, yet still perfect and undamaged.
Bournonite - classic Cornish
stock #13.1-248
Herodsfoot Mine, Lanreath, Liskard District
Cornwall, England
3.9 x 3.1 x 2.1 CM (miniature)
price: $485
Post Tucson 2015

A nicely crystallized cluster of cogswheel form Bournonite from the famed Herodsfoot Mine. An old specimen (pre 1950 but likely far older), the color is a dark "gunmetal" metallic black. The crystals have several habits and reach 1.6CM. There is damage on the edges and minor chipping but the central area of this is in good condition. Overall nice specimen of this delicate mineral from this old classic Cornish locale.
Bournonite on Quartz and Fluorite
stock #6.2-997
Yaogangxian Mine, Yizhang County, Chenzhou Pref.
Hunan Province, China
8.5 x 7 CM (cabinet)
price: $1950


A very large, lustrous cogwheel type Bournonite (over 5 CM across) that is complete sitting on Fluorite and Quartz crystals one of which penetrates the Bournonite. A exceptional example from Yaogangxian, recognized as the worlds best location for this specie. Some of the fluorite and quartz have damage especially at the edges of the piece, but overall the condition is superb. This sits upright and perfectly without assistance, and the esthetics are top shelf. Given the fragility of large bournonite, the quality and completeness of this crystal is even more remarkable. Add the Fluorite for a color accent (and an uncommon association) the whole is highly desirable.
Bournonite on Fluorite with Quartz, Boulangerite etc.
stock #6.2-491
Yaogangxian Mine, Yizhang County, Chenzhou Pref.
Hunan Province, China
8.3 X 4.7 CM (cabinet)
price: $400


A wonderful esthetic for a dark mineral like Bournonite is to be displayed on on colorful matix, and this piece does that well. Several sharp, prismatic and lustrous silvery crystals of Bournonite are well placed on a sparkling purple fluorite and quartz mixture. A few matted hairs of Boulangerite are in evidence as well. There is one Bournonite that is broken off (not very distracting tho) all the rest are quite clean by eye and only show some edge chips at 10X magnification. A very good matrix Yaoganxian piece and a good value.
Bournonite with Fluorite
stock #7 -CNA-442
Yaogangxian Mine, Yizhang County, Chenzhou Pref.
Hunan Province, China
5x3.2 CM (miniature)
price: $650


An exceptionally large metallic crystal, sharp, lusterous and with fine termination. As a bonus it is sprinkled with lotss of small light violet fluorites for an extra sparkle. In very good condition overall though there are some small spots of damage that are very forgivable in a crystal of this size and can be minimized with careful display. This is FAR better than average and really shines!
8 specimens listed
Page   1 |