Agustin Agudo Espinosa's Photo Gallery

A73-53XAragonite CaCO₃

Linz am Rhein, Neuwied District, Rhineland-Palatinate, Germany

Dimensions: 80 mm x 40 mm x 35 mm

Group of prismatic crystals of Aragonite in radial growth.
According to the old label of B. Stürtz the crystals were in basalt, which suggests that it comes exactly from Dattenberg Quarry.
Size 80x40x35 mm

Q3H-0Q1Quartz SiO₂

Boyala lode, China River District, Tolima Department, Colombia

Dimensions: 55 mm x 35 mm x 25 mm

Pair of quartz crystals in parallel growth and lamellar structure with numerous internal growth inclusions (Quartz window).
Size 55x35x25 mm

597-FGMChamosite (Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈

Saalfeld-Rudolstadt District, Thuringia, Germany

Dimensions: 60 mm x 45 mm x 20 mm

Dense mass of Chamosite (Thuringite variety).
Sample from the Academy of Natural Sciences of Philadelphia (No. 18747)
and of the collection donated to this Institution by the merchant and collector Edward Darling Drow (1861-1919) son of the collector William Appleton Drown.
Most likely this sample actually comes from the collection of the father as indicated by the accompanying label.

7WY-GC6Chalcopyrite CuFeS₂

Prinzenstein Mine, Wellmich, Sankt Goarshausen, Loreley, Rhein-Lahn District, Rhineland-Palatinate, Germany

Dimensions: 6 mm x 6 mm x 5 mm
Largest Crystal Size: 6 mm

Isolated crystal of Chalcopyrite (Kupferkies) in its original assembly.
It is a typical tetragonal disphenoid crystal with possible presence of tetragonal dipyramid.
It comes from the famous German dealer Wilhelm Maucher (1879-1930)

U4R-8K1Calcite CaCO₃

Alnö Complex, Sundsvall, Västernorrland County, Sweden

Dimensions: 80 mm x 80 mm x 40 mm

Calcite mass with the typical exfoliation and in which it is observed an alternation of dark minerals probably Aegirine and Diopside together with some Cancrinite (unconfirmed).
The sample surely comes from a Ca-Carbonatite Pegmatite. [Probably as a sample of the rock locally named as søvite pegmatite]
Ex. Dr F. Krantz.

2RG-5QDChalcopyrite CuFeS₂

Sinjakovo Mine, Jezero, Republika Srpska, Bosnia and Herzegovina

Dimensions: 90 mm x 70 mm x 70 mm

Chalcopyrite mass with colored areas with the typical purple and blue shades
Ex collection of Hans Jaklin.

18N-3UWChalcopyrite CuFeS₂ , Quartz SiO₂

Kelchalpe Cu Deposit, Aurach bei Kitzbühel, Kitzbühel District, Tyrol, Austria

Dimensions: 80 mm x 60 mm x 25 mm

Massive Chalcopyrite with some Quartz gangue.
From the collection of Hans Jaklin.

EA3-XPYSerpentine Subgroup D₃[Si₂O₅](OH)₄ D = Mg, Fe, Ni, Mn, Al, Zn

Serpentinite quarry, Chämleten, Hospental, Urseren, Uri, Switzerland

Dimensions: 16 cm x 4 cm x 3 cm

Columnar aggregate (Picrolite) with the classic silky appearance.
Ex. Collection by Edgar Franz.
Size 16x4x3 cm.

H6T-2JTTalc Mg₃Si₄O₁₀(OH)₂

Hospental, Urseren, Uri, Switzerland

Dimensions: 9 cm x 6 cm x 3 cm

Foliate mass forming a vein in schist.
Size 9x6x3 cm.
From the collection of Edgar Franz-Freiberg (No. 294)

FPL-5DPNepheline Na₃K(Al₄Si₄O₁₆) , Albite Na(AlSi₃O₈)

Saga 1 Quarry, Sagåsen, Auenlandet, Porsgrunn, Vestfold og Telemark, Norway

Dimensions: 14 cm x 10 cm x 5 cm
Largest Crystal Size: 5 cm

Specimen of Nepheline in the form of large crystals included in Albite, with the typical resinous shine (Elaeolite).
Observe the reaction edge in the form of a small pink band around the crystals formed by a mixture of several minerals probably among others Natrolite and Analcime.
size of the piece 14 x10 x 5 cm
Magnificent piece collected in 1992.
Ex collection of Michael Krause.

XVY-WXHQuartz SiO₂

Iron Mines, Alonsotegi, Vizcaya, Basque Country, Spain

Dimensions: 6 cm x 8 cm x 4 cm

Grouping of crystals of Quartz var. Milky Quartz.
Larger crystals exhibit growth, in the form of artichoke.

F3M-GFPCalcite CaCO₃

Iceland Spar Mines, Artaun, Dima, Vizcaya, Basque Country, Spain

Dimensions: 40 mm x 55 mm x 35 mm

Calcite rhombohedron of exfoliation
sample collected and donated by Agustín Valgoma

PQK-U5GCalcite CaCO₃

Iceland Spar Mines, Artaun, Dima, Vizcaya, Basque Country, Spain

Dimensions: 40 mm x 55 mm x 22 mm

Calcite rhombohedron of exfoliation
sample collected and donated by Agustín Valgoma

R31-X8XQuartz SiO₂

Tinnsjøvegen, Notodden, Vestfold og Telemark, Norway

Field of View: 70 mm

Quartz crystals with growth forms called in "cathedral" consisting of the presence of many crystals grouped in parallel growth.
Sample purchased in the store "Naturens Mangfold" in the city of Oslo.

E1D-M75Quartz SiO₂

Hattfjelldal, Nordland, Norway

Dimensions: 45 mm x 20 mm x 16 mm

Quartz crystal as highly transparent with Dauphiné habit and the presence of faces of trigonal bipyramid ("S").
Sample purchased at the store of the Natural History Museum of Oslo.

X06-K8WK Feldspar, Quartz SiO₂

Hynnekleiv Pegmatite, Hynnekleiv, Froland, Agder, Norway

Dimensions: 7 cm x 9 cm x 4 cm

Fragment of a K-feldspar crystal in which sections Quartz crystals are observed.

54R-AXUGarnet Group X₃Z₂(SiO₄)₃ , Kyanite Al₂(SiO₄)O , Omphacite (Na_aCa_bFe²⁺_cMg_d)(Al_eFe³⁺_fFe²⁺_gMg_h)Si₂O₆

Sørøyane, Herøy, Møre og Romsdal, Norway

Dimensions: 13 cm x 10 cm x 3 cm

Mass polished of Eclogite formed by numerous crystals of garnet (Almandine- Pyrope) included in a matrix of pyroxene (Omphacite) and Kyanite.

ERP-NMLWolframite (Fe²⁺)WO₄ to (Mn²⁺)WO₄

Altenberg, Sächsische Schweiz-Osterzgebirge, Saxony, Germany

Dimensions: 9 cm x 8 cm x 7 cm

Heavy mass of Wolframite formed by tabular crystals in parallel growth.
Note the fine layer of mica which is part of the wall of the vein and like the crystals of Wolframite are placed perpendicular to it.
Sample from the collection of the Philadelphia Academy of Natural Sciences, and formed part of the donation made ​​by the Franklin Institute.

PEN-1CDGalena PbS

Bere Alston Mines, Bere Ferrers, West Devon, Devon, England, UK

Dimensions: 9 cm x 7 cm

Ancient ore sample formed mainly by fine grained Galena associated to possible Tennantite.
From the collection of the Philadelphia Academy of Natural Sciences and forming part of the specimens donated by Dr. Thomas B. Wilson (1807-1865).

4K3-FYMMuscovite KAl₂(AlSi₃O₁₀)(OH)₂

Landsverk 1 Feldspar Quarry, Landsverk, Evje og Hornnes, Agder, Norway

Field of View: 70 cm

Framework of laminar crystals of Muscovite