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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

USA

Fluorite with Calcite
Fluorite with Calcite.
 

FF67AL7: Group on matrix of sharp, transparent and very shiny Fluorite crystals with an intense and uniform yellow color. The specimen, from a locality where it is currently difficult to find high quality pieces, comes from the Jan Buma collection (number 020703) whose catalogue entry we will send to the buyer.
May Stone and Sand Quarry (Hoosier Sand and Gravel Quarry), Fort Wayne, Allen County, Indiana  USA

Specimen size: 5.2 × 5.1 × 2.6 cm = 2.05” × 2.01” × 1.02”

Main crystal size: 1.8 × 1.4 cm = 0.71” × 0.55”

Fluorescent long & short UV

Former Jan Buma collection. Number 020703

€240 / US$282 / JPY29880 / AUD$394

Reservado

Mexico - Canada

Fluorite with Quartz
 

FK27AL9: Group of octahedral Fluorite crystals with curious dome-shaped tetrahexahedral terminations at the vertices. Translucent, with a uniform pale green color and on a Quartz matrix with small Pyrite crystals. Fluorite specimens from this little known mine are scarce and even more so those of a certain quality.
The specimen comes from the Jan Buma collection (#010649) whose catalogue entry we will send to the buyer.
Peregrina Mine, Guanajuato, Municipio Guanajuato  Mexico

Specimen size: 13.3 × 7.8 × 3.5 cm = 5.24” × 3.07” × 1.38”

Main crystal size: 1 × 0.9 cm = 0.39” × 0.35”

Fluorescent long & short UV

Former Jan Buma collection. Number 010649

€240 / US$285 / JPY30190 / AUD$391

Fluorite with Quartz. Fluorite with Quartz.
Reservado

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 = 3.82” × 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



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 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



Octahedral Fluorite with Pectolite.
Order

Morocco

Fluorite with Quartz
Fluorite with Quartz. Fluorite with Quartz.
 

FR14AL9: Border of Fluorite crystals with hexahedral shape, very sharp, transparent, with excellent luster and an intense yellow color, on matrix, with white Quartz crystals and small Pyrite crystals.
The specimen comes from the Jan Buma collection (#030606) whose catalogue entry we will send to the buyer.
Sidi Ayad (Sidi Ayed), Boulemane Province, Fès-Meknès Region  Morocco (±2003)

Specimen size: 7 × 5.4 × 3.3 cm = 2.76” × 2.13” × 1.30”

Main crystal size: 1 × 0.7 cm = 0.39” × 0.28”

Fluorescent long & short UV

Former Jan Buma collection. Number 030606

€190 / US$225 / JPY23900 / AUD$310

Reservado
Fluorite with Pyrite
 

NT67AL8: Group of cubic Fluorite crystals with polycrystalline staggering on the edges. Translucent, bright, with an intense green color and with coatings of small Pyrite crystals on the back.
The specimen comes from the Jan Buma collection (number 010619) whose catalogue entry we will send to the buyer.
El Hamman, Meknès, Meknès Prefecture, Drâa-Tafilalet Region  Morocco

Specimen size: 9.8 × 6 × 4.4 cm = 3.86” × 2.36” × 1.73”

Main crystal size: 1.5 × 1.3 cm = 0.59” × 0.51”

Very fluorescent long & short UV

Former collection of Michel Carré
Former collection Jan Buma. Number 010619



Fluorite with Pyrite. Fluorite with Pyrite.
Order

South America

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.
Order
Quartz with Muscovite inclusions, Fluorite and Dolomite
Quartz with Muscovite inclusions, Fluorite and Dolomite. 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 = 3.78” × 2.68” × 1.30”

Main crystal size: 1.6 × 1.1 cm = 0.63” × 0.43”

Fluorescent long UV & minor fluorescence short UV

Former Jan Buma collection. Number 081001



Order
Fluorite with Quartz and Dolomite
 

FL89AL7: Very sharp Fluorite crystals, transparent, with good luster and a uniform violet color much more intense on the edges. On a matrix of water-clear Quartz crystals partially covered with small white Dolomite crystals. The specimen comes from the Jan Buma collection (number 040704) whose catalogue entry we will send to the buyer.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (±2004)

Specimen size: 9.7 × 8.4 × 6.1 cm = 3.82” × 3.31” × 2.40”

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

Fluorescent long & short UV

Former Jan Buma collection. Number 040704



Fluorite with Quartz and Dolomite. Front
Front
Fluorite with Quartz and Dolomite. Side
Side
Fluorite with Quartz and Dolomite.
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
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 = 4.65” × 4.49” × 1.42”

Main crystal size: 1.7 × 1.6 cm = 0.67” × 0.63”

Minor fluorescence long UV

Former Jan Buma collection. Number 011039



Fluorite with Quartz. Fluorite with Quartz.
Order

Asia

Fluorite on Quartz
Fluorite on Quartz.
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



Order

The Jan Buma Indian Zeolite Collection

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



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


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