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Mineral Specimens - page 17
The Jan Buma Collections

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Jan Buma, apart from being a great person, is a Dutch mineral collector who is very well known at most of the European shows since for many years he has attended them with great dedication. At these shows he bought a large number of specimens, initially all types of worldwide minerals, and then only in the three key areas of his collection: Fluorite, Rumania, Indian Zeolites and related species.

I have kept up a long friendship with Jan, which started many years ago at a Munich show. Back then I sold him one of the first specimens from the Emilio Mine, which caught his attention as it was a new locality at that time. Since then we have always kept in touch and done regular deals. So, when he sold his worldwide collection of minerals I had the opportunity and good luck of buying it. Some time later Jan decided to concentrate on an even more select range of minerals: just one, in fact - Fluorite. So he then sold his collection of Indian Zeolites and Rumanian specimens. Once again I was lucky enough to have the chance of buying his collection of Indian minerals.

THE FLUORITE COLLECTION

In 2004 Jan Buma decided to concentrate on only high quality Fluorite specimens, so he decided to sell off most of his Fluorites, keeping just a select few. Jan decided to separate the Fluorites he had for sale into two groups: ones that were easier to sell, as the specimens were relatively cheap and they were of interest because of the localities they came from; the second were the better specimens, in which the range of locations and the good quality were both noteworthy. At the end of 2010, Jan Buma, after having built yet another excellent collection of Fluorite, decided to sell his entire collection, including his best pieces.

Both the quality of the specimens, and the range of localities makes this a really interesting collection. Each specimen is very well documented, as it comes with a record on which Jan noted details of the mineral, the locality, when he bought it, who he bought if from, and how much he paid.

We hope that you enjoy these specimens from the Jan Buma Collection as much as we have enjoyed them.

Jordi Fabre

The Jan Buma Fluorite Collection


Western Europe

Fluorite with Siderite and Sphalerite
Fluorite with Siderite and Sphalerite. Front
Front
Fluorite with Siderite and Sphalerite. Side
Side

MD86W8: Aggregate of transparent cubic crystals of Fluorite that are very bright, have a very clear lilac color and are mostly coated by Siderite with complex crystals of Sphalerite. We’ll send the Jan Buma collection caed to the buyer of the sample.
Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham  England, United Kingdom (±1976)

Specimen size: 9.7 × 6.5 × 8.5 cm = 3.8” × 2.6” × 3.3”

Main crystal size: 1.4 × 1 cm = 0.6” × 0.4”

Very fluorescent long & short UV

Former Jan Buma collection. Number 061004



Order

FSU

Octahedral Fluorite with Pectolite

FC6H5: Green octahedral crystals of well defined faces and edges on a matrix of Sphalerite. Between the Sphalerite and Fluorite there is a bed of radial groups of white fibrous crystals of Pectolite, also partially covering Fluorite.
Second Sovietsky Mine, Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region  Russia (12/1996)

Specimen size: 7 × 4.7 × 4.4 cm = 2.8” × 1.9” × 1.7”

Main crystal size: 2 × 2.1 cm = 0.8” × 0.8”

Extremely fluorescent long & short UV

Former Jan Buma collection. Number 981032



Octahedral Fluorite with Pectolite.
Order
Fluorite with Calcite
Fluorite with Calcite.
Fluorite with Calcite.

FV87H5: Group of transparent cubic crystals that have nice green color, They stand on a matrix with some crystals of Calcite. A sample of quality.
Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region  Russia (±2002)

Specimen size: 9 × 9 × 6 cm = 3.5” × 3.5” × 2.4”

Main crystal size: 2.8 × 1.9 cm = 1.1” × 0.7”

Intense fluorescence long & short UV

Former Jan Buma collection. Number 020632



Order

South America

Fluorite with Pyrite, Sphalerite and Quartz

FV63T3: Group of very sharp cubic crystals of Fluorite that show a uniform and clear green color and have inclusions of Sphalerite and Pyrite and are partially coated by microcrystalline Quartz. The matrix is a group of very well defined crystals of Sphalerite, with small crystals of Pyrite and with Quartz on the base of the piece.
Huanzala Mine, Huallanca District, Dos de Mayo Province, Huαnuco Department  Peru (±1999)

Specimen size: 5.7 × 4.4 × 3.3 cm = 2.2” × 1.7” × 1.3”

Main crystal size: 1.6 × 1.3 cm = 0.6” × 0.5”

Fluorescent long & short UV

Former Jan Buma collection. Number 990301



Fluorite with Pyrite, Sphalerite and Quartz. Fluorite with Pyrite, Sphalerite and Quartz.
Order
Octahedral Fluorite with Microcline
Octahedral Fluorite with Microcline. Front
Front
Octahedral Fluorite with Microcline. Side
Side

FB13AB9: Complex Fluorite crystals with the clearly predominant form of the octahedron and slightly curved dodecahedral faces. They are between transparent and translucent, have a lilac color and have associated small Microcline growths and smoky Quartz. The main octahedral-shaped crystal is huge for the locality.
Papachacra Formation, Portezuelo Granite, Belen Department, Catamarca  Argentina (±2005)

Specimen size: 7.5 × 7.2 × 6.3 cm = 3.0” × 2.8” × 2.5”

Main crystal size: 6.4 × 6.2 cm = 2.5” × 2.4”

Former Jan Buma collection. Number 050111



Order

China

Fluorite

MZ56AB9: Spheroidal Fluorite growth with crystalline and skeletal growths on the back. It has a very intense and uniform bluish-violet color. For some reason this mine always produced a very limited number of samples, and even less with such quality.
Guxian, Minggang, Shihe District, Xinyang Prefecture, Henan Province  China (±2007)

Specimen size: 6.9 × 5.7 × 3.5 cm = 2.7” × 2.2” × 1.4”

Fluorescence short UV & minor fluorescence long UV

Former Jan Buma collection. Number 070604



Fluorite.
Order
Fluorite with Ferberite and Muscovite
Fluorite with Ferberite and Muscovite. Front
Front
Fluorite with Ferberite and Muscovite. Side
Side

FM27AA9: Two very sharp cubic Fluorite crystals, transparent, very bright and with a blue color with violet shades, on a group of very well defined and bright Ferberite crystals partially coated by small leafy Muscovite aggregates. A very esthetic and especially graceful miniature.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2001)

Specimen size: 4.3 × 3.7 × 2 cm = 1.7” × 1.5” × 0.8”

Main crystal size: 1.1 × 1 cm = 0.4” × 0.4”

Minor fluorescence long & short UV

Former Jan Buma collection. Number 080102



Order
Scheelite with Fluorite, Dolomite and Quartz

FC67AA9: Very sharp, translucent and almost colorless Scheelite crystals on an aggregate of transparent small, cubic, Fluorite crystals with a clear lilac color, with Quartz crystals and partially coated by rhombohedral Dolomite. Unusual association for this “modern-classic,” from a mine which has not produced samples of quality for a long time.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2007)

Specimen size: 7.1 × 4.2 × 4.3 cm = 2.8” × 1.7” × 1.7”

Extremely fluorescent short UV

Former Jan Buma collection. Number 070209



Scheelite with Fluorite, Dolomite and Quartz. Scheelite with Fluorite, Dolomite and Quartz.
Order
Fluorite with Calcite
Fluorite with Calcite. Fluorite with Calcite.

MR49W8: Aggregate of very sharp cubic crystals that are very bright, transparent and with an intense, deep and uniform color. We’ll send the Jan Buma collection card to the buyer of the sample.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2007)

Specimen size: 8.3 × 7.5 × 5.5 cm = 3.3” × 3.0” × 2.2”

Main crystal size: 2.9 × 2.8 cm = 1.1” × 1.1”

Former Jan Buma collection. Number 070402



Order
Quartz with Muscovite inclusions, Fluorite and Dolomite

ME76W8: Floater group of Quartz crystals with phantom growths. They are partially coated by transparent cubic crystals of Fluorite, extraordinarily bright and with a neat sky blue color, and by small White crystals of Dolomite on the back. We’ll send the Jan Buma collection card to the buyer of the sample.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2008)

Specimen size: 9.6 × 6.8 × 3.3 cm = 3.8” × 2.7” × 1.3”

Main crystal size: 1.6 × 1.1 cm = 0.6” × 0.4”

Fluorescent long UV & minor fluorescence short UV

Former Jan Buma collection. Number 081001



Quartz with Muscovite inclusions, Fluorite and Dolomite. Quartz with Muscovite inclusions, Fluorite and Dolomite.
Order
Fluorite with Muscovite, Quartz and Arsenopyrite
Fluorite with Muscovite, Quartz and Arsenopyrite. Fluorite with Muscovite, Quartz and Arsenopyrite.

To see a larger 3D image please
click here or on the image

MG68T1: Group of crystals formed by the dominant faces of the cube, beveled by the dodecahedron and truncated by an octahedron that is poorly defined and has curvatures and is rough surfaced. It is on matrix, and has been sawn on the back to give a good balance to the sample. With Muscovite, white Quartz and small crystals of Arsenopyrite.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (10/2006)

Specimen size: 12.6 × 8.8 × 4.6 cm = 5.0” × 3.5” × 1.8”

Main crystal size: 2.8 × 2.2 cm = 1.1” × 0.9”

Fluorescent long UV & minor fluorescence short UV

Former Jan Buma collection. Number 070302



Order
Topaz with Fluorite, Arsenopyrite, Quartz and Calcite

MD67W8: A very unusual combination from this Chinese mine of Topaz crystals, with very well defined faces and between colorless and white, plus cubic crystals of Fluorite that are transparent, very bright, with a clear lilac color and geometric zoning. They all are on matrix with crystals of Calcite, Arsenopyrite and Quartz. We’ll send the Jan Buma collection card to the buyer of the sample.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2004)

Specimen size: 6.9 × 6.8 × 2.6 cm = 2.7” × 2.7” × 1.0”

Fluorescent short UV

Former Jan Buma collection. Number 041003



Topaz with Fluorite, Arsenopyrite, Quartz and Calcite. Topaz with Fluorite, Arsenopyrite, Quartz and Calcite.
Order
Fluorite with Quartz
Fluorite with Quartz. Fluorite with Quartz.

MX27T1: Group of transparent cubic crystals with very well defined faces and edges and a pale green color with small areas of intense and deep violet color. On matrix, with small crystals of Quartz.
Xianghuapu Mine, Xianghualing Sn-polymetallic ore field, Linwu, Chenzhou Prefecture, Hunan Province  China (±2001)

Specimen size: 11.8 × 11.4 × 3.6 cm = 4.6” × 4.5” × 1.4”

Main crystal size: 1.7 × 1.6 cm = 0.7” × 0.6”

Minor fluorescence long UV

Former Jan Buma collection. Number 011039



Order

Asia

Fluorite on Quartz

FB36G6: Between the Quartz crystals appears a sphere of Fluorite and, furthermore, from the same sphere starts some sceptered Quartz, different in its color and shape to the Quartz on the matrix. The lower part of the piece is hollowed, as if it growth was covering an older material.
Mahodari, Nashik District (Nasik), Maharashtra  India (±2000)

Specimen size: 8.5 × 6 × 6.7 cm = 3.3” × 2.4” × 2.6”

Main crystal size: 2.6 × 2.3 cm = 1.0” × 0.9”

Former Jan Buma collection. Number 201011



Fluorite on Quartz.
Fluorite on Quartz.
Order

The Jan Buma Indian Zeolite Collection


Fluorapophyllite-(K) with Heulandite-Ca
Fluorapophyllite-(K) with Heulandite-Ca.
Fluorapophyllite-(K) with Heulandite-Ca.

JR6F2: Tabular crystals are uncommon in Indian Fluorapophyllite-(K). In this case they are also very well defined and aerial, with a very light green tone and a good contrast with the cream-colored Heulandite-Ca.
Jalgaon District, Maharashtra  India (±2002)

Specimen size: 9.5 × 6 × 4 cm = 3.7” × 2.4” × 1.6”

Main crystal size: 2.5 × 2.5 cm = 1.0” × 1.0”

Former Jan Buma collection. Number 020520



Order
Fluorapophyllite-(K) with Stilbite and inclusions

JV47F2: The crystals of Fluorapophyllite-(K) are tabular, which is not very common in Indian specimens. It is partially included by Chlorite and on a matrix of pink Stilbite.
Nashik District (Nasik), Maharashtra  India (±1999)

Specimen size: 11 × 10 × 4 cm = 4.3” × 3.9” × 1.6”

Main crystal size: 2.4 × 2.3 cm = 0.9” × 0.9”

Former Jan Buma collection. Number 991024



Fluorapophyllite-(K) with Stilbite and inclusions.
Fluorapophyllite-(K) with Stilbite and inclusions.
Order


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