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ST69AF0: Dolomite
Druse of crystals with dominant rhombohedron faces. They are translucent and extraordinarily bright.
The sample is from the Francesco S. Stoppani collection (catalog number 0946), whose label we’ll send to the buyer. As is the case with so many specimens in this collection, the sample is of great quality for the locality.
Oberdorf an der Laming, Laming Valley, Bruck an der Mur, Styria/Steiermark  Austria
Specimen size: 7 × 6.7 × 3.7 cm = 2.76” × 2.64” × 1.46”
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TB90AL4: Dolomite
Curious botryoidal Dolomite, uncommon in this locality, with smooth and silk-shiny surfaces and a soft pink color. The specimen has been analyzed and we will send the buyer a copy of the analysis.
Tsumeb Mine, Tsumeb, Otjikoto Region  Namibia
Specimen size: 21.2 × 11.9 × 8 cm = 8.35” × 4.69” × 3.15”

Main crystal size: 2.7 × 1.8 cm = 1.06” × 0.71”
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MR90AH7: Dolomite
Aerial group of sharp rhombohedral Dolomite crystals that are twinned and bright, between transparent and translucent, with phantom growths and fine alignments of black globular growths, probably Graphite, a Spanish classic.
Azcárate Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain
Specimen size: 8 × 7 × 5.5 cm = 3.15” × 2.76” × 2.17”
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SV490MRX: Dolomite
Group of very sharp Dolomite crystals, two of them clearly dominant, rhombohedral and with very marked, transparent and lustrous penetration twins. With internal growth figures and external sprinklings of very tiny Chalcopyrite crystals.
Azcárate Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (1998)
Specimen size: 10.4 × 9.7 × 9 cm = 4.09” × 3.82” × 3.54”

Main crystal size: 7.5 × 5.4 cm = 2.95” × 2.13”
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TT51AJ5: Dolomite
A group, on matrix, of sharp rhombohedral Dolomite crystals with very well defined interpenetration twins. They are transparent, very bright and colorless. A Spanish classic of great quality.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 9.5 × 8.1 × 6.7 cm = 3.74” × 3.19” × 2.64”
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TLM53AO4: Dolomite
Very sharp rhombohedral Dolomite crystals with a very well defined interpenetration twin, of considerable size, water-clear, lustrous, and with geometric zoning on the edges. Excellent Spanish classic.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 11.7 × 10.3 × 4.9 cm = 4.61” × 4.06” × 1.93”

Main crystal size: 6.1 × 4.6 cm = 2.40” × 1.81”

MFB16CD6: Dolomite
An exceptional piece. Group of Dolomite crystals, two of them clearly dominant, on a matrix covered by crystals of smaller dolomites. The crystals are extraordinarily transparent and lustrous, twinned, and with very well defined faces and edges, perfect. An old specimen, from the now extinct Asturreta Quarry in Eugui. A classic of Spanish mineralogy of very notable quality.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (+1970)
Specimen size: 9 × 7.7 × 5.9 cm = 3.54” × 3.03” × 2.32”
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DP16AG6: Dolomite
The Daunis collection is a faithful mirror of the minerals that were found in Spain in the 60’s and 70’s. The Asturreta Quarry, specifically the area called "El Pozo," produced in those years the best known Dolomites and Daunis had the ability to get some of them of extraordinary quality. This piece is a good example.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 7.2 × 6.5 × 5.2 cm = 2.83” × 2.56” × 2.05”

Main crystal size: 4.2 × 3.5 cm = 1.65” × 1.38”
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FL46: Dolomite
Floater, complete in all sides, twinned, sharp, gemmy with zoned phantoms. A quality specimen of the classic Eugui Dolomites.
Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain
Specimen size: 4.5 × 3.5 × 2 cm = 1.77” × 1.38” × 0.79”
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RQ46Q5: Dolomite
Twinned rhombohedral crystals with the usual quality for Eugui, with very well defined faces and edges, from transparent to translucent and very bright. A Spanish classic.
Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (1959)
Specimen size: 6.9 × 4.4 × 2.7 cm = 2.72” × 1.73” × 1.06”

Main crystal size: 3.4 × 3.3 cm = 1.34” × 1.30”
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RZ46R6: Dolomite
Aerial group of translucent and bright rhombohedral crystals. The Folch collection records note that is was collected by F. Coma October 1959.
Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain
Specimen size: 5.8 × 3.8 × 3.9 cm = 2.28” × 1.50” × 1.54”
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RP17F9: Dolomite
The crystals of this aggregate have great clarity and brightness, with inner iridescent inclusions. The interpenetration twin is apparent in different zones on the specimen.
Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (1968)
Specimen size: 7 × 5 × 3.7 cm = 2.76” × 1.97” × 1.46”
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RQ10X8: Dolomite
Aggregate of Sharp, white rhombohedral Dolomite crystals. They are translucent and have very well marked phantom growths.
Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain
Specimen size: 6.2 × 5.8 × 4.5 cm = 2.44” × 2.28” × 1.77”
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ED27R3: Dolomite
Group of sharp twinned rhombohedral crystals on matrix with very well defined faces and edges. The main crystal has a curious geometrical zoning that leaves one of its quadrants completely clear while the other three have gray inclusions.
The sample comes from the Museum of Luxembourg (register CK015) whose label will be sent to the buyer.
Azcárate Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain
Specimen size: 4.9 × 4 × 3.4 cm = 1.93” × 1.57” × 1.34”

Main crystal size: 2.4 × 2.2 cm = 0.94” × 0.87”
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FC76: Dolomite
A curious specimen. It is a Dolomite totally covered (but not pseudomorphosised) by a thin chocolate cover of iron oxides. First impressions when you look at the specimen are: nice Siderite! When you look more carefully you will discover that the primary crystals are really white curved Dolomite crystals totally covered by a lustrous, brilliant, colorful coating. Something different!
Vekol Mine, Sif Vaya area, Vekol District, Tohono O'odham Indian Reservation, Pinal County, Arizona  USA
Specimen size: 6.5 × 5.1 × 2 cm = 2.56” × 2.01” × 0.79”
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NLL16AO5: Dolomite (Fe-bearing dolomite)
Iron-bearing Dolomite crystals with a very pronounced saddle shape, with strong curvatures and polycrystalline growths, with good luster and a color between light brown and pink, on matrix. The specimen comes from the collection of Santiago Jiménez who, especially in the 1980s and '90s, managed to collect many rarities from urban and peri-urban areas of Northern Spain, very little disclosed before in the mineral collecting world.
El Covarón mines, Covarón (Kobaron), Muskiz, Comarca Gran Bilbao, Vizcaya / Bizkaia, Basque Country (Euskadi)  Spain
Specimen size: 10 × 7.8 × 3.1 cm = 3.94” × 3.07” × 1.22”
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SV2240TFG: Dolomite (twinned)
Group of sharp rhombohedral Dolomite crystals with distinct interpenetration twins, transparent, lustrous and colorless, with striations on the crystal faces and fine geometric zoning in the interior. A classic of Spanish mineralogy, from the “el pozo” area; where the best specimens of this species came from. It was in the Paul Fitte collection.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 5.4 × 5.2 × 3 cm = 2.13” × 2.05” × 1.18”
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JJR37AP8: Dolomite (twinned)
Very aerial group of twinned rhombohedral Dolomite crystals, water-clear, very lustrous, and in matrix. A Spanish classic that comes from the collection of Andrés Jiménez Shelly.
Azcárate Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (1982)
Specimen size: 9.3 × 6.6 × 3.5 cm = 3.66” × 2.60” × 1.38”

Main crystal size: 2.3 × 2.1 cm = 0.91” × 0.83”
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JFD182AP2: Dolomite (twinned)
The great classics are always great classics! Even though it is not a top piece, more than anything because of the size of the crystal, it is a Dolomite from 'el pozo' in matrix, undamaged, twinned and has that special 'light', that transparency and luster of the best dolomites from Eugui, those of 'el pozo'
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1972)
Specimen size: 6.4 × 4.2 × 4.4 cm = 2.52” × 1.65” × 1.73”
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TCB47AP9: Dolomite (twinned)
Group of very sharp rhombohedral Dolomite crystals, with well defined interpenetrating twins, between translucent and transparent and with colorless areas alternating with grey. The specimen comes from the Paul Fitte collection.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 7.1 × 5.7 × 5.6 cm = 2.80” × 2.24” × 2.20”
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JFD228AP9: Dolomite (twinned)
Eugui dolomites are always exciting. I chose this one for its transparency and for that 'clean' appearance that the dolomites from the area of “el pozo” have; thanks to the good disposition of engineer Juan Córdoba. The crystal has a weird growth on one side, but it is a floater and whole everywhere.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 8 × 6.9 × 4.3 cm = 3.15” × 2.72” × 1.69”
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SV480EFX: Dolomite (twinned)
Group of very sharp Dolomite crystals, two of them clearly dominant, rhombohedral, with very marked penetration twins, between transparent and translucent, in rock matrix. Worthy of note is a great dark phantom in the main crystal, quite uncommon in such a size in specimens from this locality. A classic for Spanish mineralogy and especially for this species.
Azcárate Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain
Specimen size: 12.5 × 11.8 × 10.2 cm = 4.92” × 4.65” × 4.02”

Main crystal size: 6.6 × 4 cm = 2.60” × 1.57”
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MAX51CD2: Dolomite (twinned)
Intergrown crystals of well-defined, transparent, shiny, and aerial Dolomite on its matrix. The dolomites from Eugui are one of the hallmarks of Spanish mineralogy, and this particular piece stands out for the great transparency of its crystals and their aerial and individualized shape.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (+1970)
Specimen size: 7.9 × 7.3 × 5.7 cm = 3.11” × 2.87” × 2.24”
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SA96AC1: Dolomite (twinned)
Aggregate of crystals formed by the positive and the negative rhombohedron, twinned, very sharp and transparent. They have grown on a first generation of translucent white rhombohedrons of the same Dolomite. This kind of twin is very uncommon at Eugui, so, historically, they have been very appreciated by collectors.
Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1965)
Specimen size: 14.5 × 11.4 × 8.7 cm = 5.71” × 4.49” × 3.43”

Main crystal size: 5 × 4.2 cm = 1.97” × 1.65”
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HM780EM: Dolomite (twinned)
Group of very sharp rhombohedral Dolomite crystals, transparent, with good luster, a slightly gray color and on matrix. An excellent Spanish classic.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)
Specimen size: 14.5 × 11.8 × 6.8 cm = 5.71” × 4.65” × 2.68”

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