Agustin Agudo Espinosa's Photo Gallery

18N-3UWChalcopyrite : CuFeS₂, Quartz : SiO₂

Kelch Alp, Kitzbühel, Kitzbühel Alps, North Tyrol, 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, Mørje, Porsgrunn, 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

Tinnsjå, Notodden, 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, Aust-Agder, Norway

Dimensions: 7 cm x 9 cm x 4 cm

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