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

Mexico - Canada

Fluorite with Calcite and Pyrite
Fluorite with Calcite and Pyrite. Front
Front
Fluorite with Calcite and Pyrite. Side
Side
Fluorite with Calcite and Pyrite.
Fluorite with Calcite and Pyrite  

FT37AM1: Druse on matrix of very sharp octahedral Fluorite crystals, transparent, shiny, colorless, with slightly lilac tones in some areas of the specimen and partially covered by white rhombohedral Calcite crystals and with inclusions of small Pyrite crystals.
The specimen comes from the Jan Buma collection (no. 850111), whose catalogue entry we will send to the buyer. He bought it from Richard W. Barstow whose label we will also send to the buyer.
Naica Mine, Naica, Municipio Saucillo, Chihuahua  Mexico

Specimen size: 16.7 × 9.6 × 6.9 cm = 6.57” × 3.78” × 2.72”

Main crystal size: 1.2 × 1.1 cm = 0.47” × 0.43”

Calcite fluorescent long & short UV

Former Jan Buma collection. Number 850111



Order

Western Europe

Fluorite with Siderite and Sphalerite
 

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 = 3.82” × 2.56” × 3.35”

Main crystal size: 1.4 × 1 cm = 0.55” × 0.39”

Very fluorescent long & short UV

Former Jan Buma collection. Number 061004



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

FSU

Octahedral Fluorite with Pectolite
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 Sovetskii Mine, Dalnegorsk, Dalnegorsk Urban District, Primorsky Krai  Russia (12/1996)

Specimen size: 7 × 4.7 × 4.4 cm = 2.76” × 1.85” × 1.73”

Main crystal size: 2 × 2.1 cm = 0.79” × 0.83”

Extremely fluorescent long & short UV

Former Jan Buma collection. Number 981032



Order
Fluorite (octahedral) with Quartz
 

FR16AM5: The characteristic cube-octahedral Fluorite of Kara-Oba of dark violet color on a doubly terminated Quartz of a snow white color which gives a special contrast. The sample comes from the Jan Buma collection (num. 920301) and we’ll send the card of the collection with it.
Kara-Oba, Betpak-Dala (Bet-Pak-Dala) Desert, Karaganda Region  Kazakhstan

Specimen size: 12.6 × 4.5 × 4 cm = 4.96” × 1.77” × 1.57”

Former Jan Buma collection. Number 920301



Fluorite (octahedral) with Quartz. Fluorite (octahedral) with Quartz.
Order

South America

Fluorite with Sphalerite
Fluorite with Sphalerite. Fluorite with Sphalerite.
 

FC26AM1: Druse of very sharp crystals of Sphalerite (variety marmatite) covered by small crystals of Fluorite that are transparent, lustrous, and have a pale lilac color.
The specimen comes from the Jan Buma collection (no. 200401), whose catalogue entry we will send to the buyer.
Pasto Bueno District, Pallasca Province, Ancash Department  Peru

Specimen size: 4.5 × 3.9 × 2.6 cm = 1.77” × 1.54” × 1.02”

Minor fluorescence short UV

Former Jan Buma collection. Number 200401



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Hübnerite with Quartz and Fluorite
 

FE56AM1: Parallel aggregates of Hübnerite on a matrix of Quartz crystals and with coatings of small white Fluorite crystals. A very rare paragenesis. The specimen comes from the Jan Buma collection (no. 200401), whose catalogue entry we will send to the buyer.
Huayllapon Mine (Huallapon Mine), Pasto Bueno District, Pallasca Province, Ancash Department  Peru

Specimen size: 9.8 × 8 × 7 cm = 3.86” × 3.15” × 2.76”

Main crystal size: 0.8 × 0.8 cm = 0.31” × 0.31”

Fluorescent long & short UV

Former Jan Buma collection. Number 081201



Hübnerite with Quartz and Fluorite. Front
Front
Hübnerite with Quartz and Fluorite. Rear
Rear
Hübnerite with Quartz and Fluorite.
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 = 2.95” × 2.83” × 2.48”

Main crystal size: 6.4 × 6.2 cm = 2.52” × 2.44”

Former Jan Buma collection. Number 050111



Order

China

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 = 3.27” × 2.95” × 2.17”

Main crystal size: 2.9 × 2.8 cm = 1.14” × 1.10”

Former Jan Buma collection. Number 070402



Fluorite with Calcite. Fluorite with Calcite.
Fluorite with Calcite. Led light
Led light
Order
Fluorite with Dolomite
Fluorite with Dolomite. Front
Front
Fluorite with Dolomite. Side
Side
Fluorite with Dolomite.
 

FQ68AL7: Clusters of very sharp and shiny Fluorite crystals, sky-blue in color with distinct phantoms and covered with small white Dolomite rhombohedra that also appear as inclusions inside some of the Fluorite crystals.
The specimen comes from the Jan Buma collection (number 070403), whose base with the locality and the collection number we will send to the buyer but not the usual Jan Buma collection card, since in this case we do not have it.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China

Specimen size: 12.3 × 6 × 8 cm = 4.84” × 2.36” × 3.15”

Main crystal size: 1.7 × 1.5 cm = 0.67” × 0.59”

Former Jan Buma collection. Number 070403



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 = 2.80” × 1.65” × 1.69”

Extremely fluorescent short UV

Former Jan Buma collection. Number 070209



Scheelite with Fluorite, Dolomite and Quartz. Scheelite with Fluorite, Dolomite and Quartz.
Order
Topaz with Fluorite, Arsenopyrite, Quartz and Calcite
Topaz with Fluorite, Arsenopyrite, Quartz and Calcite. 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 = 2.72” × 2.68” × 1.02”

Fluorescent short UV

Former Jan Buma collection. Number 041003



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 = 3.35” × 2.36” × 2.64”

Main crystal size: 2.6 × 2.3 cm = 1.02” × 0.91”

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 = 3.74” × 2.36” × 1.57”

Main crystal size: 2.5 × 2.5 cm = 0.98” × 0.98”

Former Jan Buma collection. Number 020520



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