Merelani Hills, Lelatama Mountains, Simanjiro District
5.9 x 3.7 x 3.4 CM (cabinet)
"Cockcomb" habit spray of well defined Prehnite crystals from the recent finds at Merlani. The individual crystals are flattish blade type with distinct individual terminations, up to 2.6 CM tall. The Prehnite is all translucent, has a bright luster and a pleasing green to yellow hue. The white clusters are Calcite (fluorescent) with a few Pyrite cubes scattered about . These Tanzanian Prehnites are a very good value and can have outstanding form. This is a choice example.
Carminite with and in Calcite
La Cigüeña Vein area, Mina Ojuela, Mapimi
7.8 x 6.3 x 2.6 CM (cabinet)
An outstanding Carminite specimen from Ojuela found in the early 80's. Even without the Carminite this would be a fine Calcite with elongated glass clear crystals on contrasting matrix. However as these Calcite are resting on and included by bright red prisms and spays of Micro Carminite it is something very special. The matrix is a complex gossan well covered with micro Carminites which are also on the backside but without the Calcites. Some other very small yellow crystals may be Beudantite but are not analyzed, these are well under .05 MM. The Gemmy Calcite is in excellent condition, with bright luster, The quality of the Carminite (as is typical for the specie) is best appreciated under good magnification, by naked eye it looks like a very red rust, however close exam shows thousands of brilliant red sprays, fans, needles and clusters of Carminites. Choice for the specie and excellent for the locality, Carminite is not often seen larger than thumbnail or micro-mount specimens but this is a cabinet sized specimen with a nice display quality.
Perfect, with killer color, transparent Fluorite crystals aesthetically perched on a mix of smaller Fluorites and Muscovite. The luster and color zoning are exceptional, there is no damage and the main cubes show penetration twinning. This piece shows very well the quality that made the Yaogangxian Mine's reputation. The cubes have several separate phantoms and a more diffuse core color of vivid purple. An older specimen from 2008, this is quite different from more recent finds and is simply a super piece in person.
Siderite - unusual form
Poudrette Quarry, Mont Saint-Hilaire
3.6 x 3.3 x .9 CM (miniature)
A complete, undamaged Siderite crystal in the rare triangular form that was distinctive only at Mont St. Hilaire. This legendary locale at one time produced Rhodochrosites and Siderites (both Carbonate minerals) in this habit almost never seen any place else. The Siderite is translucent as well, with a strong back-light it glows a yellow green color. The photos here are not backlit as this shows better the specimen in a "normal" display. In fine condition, no chips or damage, an odd Siderite and a very nice St Hilaire specimen.
A choice old Carn Brea (Cornwall) specimen of Chalcopyrite crystals in Tetrahedral form, well coated with a dark Bornite. Excellent pedigree, previous collections include AK Borland, Brian Lloyd and John Marshall (labels etc included). The matrix is mostly Quartz with some pinkish crystals and some areas of Pyrite. The Chalcopyrites are quite sharp, up to 1.4 CM these are protected in two main vugs so most are in quite good condition. Some minor chipping is noted under loupe inspection, overall displays and looks clean. This mine has long ago vanished but over 100 years ago it produced some great Bornite and Chalcopyrite. A nice specimen from a significant locality in Cornwall.
A sharp and colorful single Veszelyite crystal with brilliant luster. From the now classic and best USA find at the Black Pine Mine, these are only available from collection disbursements. A superb example of this rare Copper Zinc Phosphate. The Black Pine specimens are certainly the best and largest on the planet, this specimen is far above average for size, quality and display character. A few small contacts are noted but there is no damage or chipping and the termination is especially well-defined. Looks fine from either side, this piece dates back over 30 years, I believe that the last find was about 25 years ago and it seems there will never be any more.
Polybasite on Acanthite
Guanajuato, Municipio de Guanajuato
3.2 x 2.4 x 1.7 CM (thumbnail)
A killer specimen with exceptional form, the main crystal being textbook perfect, sharp and perfectly defined. Formerly in the collections of Carl Acosta and Brett Keller, this is just barely within the size limit to be classified a thumbnail. The Acanthite matrix is the "melted" look type and is a fine contrast to the large Polybasite. Displays well from either side, what we consider to be the front or best view has a nice metallic patina. Most of the Polybasite we have seen from Guanajuato is more crude or has overgrowths of Pyrite, this is just a superb example of the specie and extraordinary for the locality.
Yellow Prehnite in a crystalline ball from the Loanhead Quarry, Scotland. A single gem clear Apophyllite crystal is a fine contrast. From the Les Hitchings collection, this was collected by him in 1974 during an extended trip to Scotland where he spent weeks digging in the Glasgow area. This was the best Prehnite he obtained.