Mineral Specimens - page 17
The Jan Buma Collections

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Carles Curto Text: Carles Curto (formerly curator of the Geology Museum, Barcelona) & Jordi Fabre
Assistance from John S. White (former Smithsonian curator) John S. White

 


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

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.
Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco 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

minID: H31-CRE



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, Pampas 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

minID: 7F3-12M



Hübnerite with Quartz and Fluorite. Front
Front
Hübnerite with Quartz and Fluorite. Rear
Rear
Hübnerite with Quartz and Fluorite.

China

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

minID: N56-AMH



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.
Fluorite with Calcite
Fluorite with Calcite. Front
Front
Fluorite with Calcite. With light behind
With light behind
Fluorite with Calcite.
Fluorite with Calcite  

HM220FP: Group of cubo-octahedral crystals of Fluorite, with very well marked polycrystalline growths, transparent, with bright luster and a pale green color. On matrix and with white scalenohedral Calcite crystals. The specimen comes from the Jan Buma collection (nº 090606) whose catalogue entry we will send to the buyer.
Huangshaping Mine, Guiyang, Chenzhou Prefecture, Hunan Province  China (±2009)

Specimen size: 10.2 × 7.6 × 4 cm = 4.02” × 2.99” × 1.57”

Main crystal size: 3.4 × 3.1 cm = 1.34” × 1.22”

Former Jan Buma collection. Number 090606




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.


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