Alejandro Felix Gutierrez's Photo Gallery

G2P-J59Rutile TiO₂ , Kyanite Al₂(SiO₄)O , Quartz SiO₂ , Pyrophyllite Al₂Si₄O₁₀(OH)₂

Graves Mountain, Lincoln County, Georgia, USA

Dimensions: 6.6 cm x 5.2 cm x 4.4 cm
Largest Crystal Size: 21 mm

This is a good example of the paragenesis of the locality, rutile porphyroblasts in kyanite schists. Other observed minerals include quartz and pyrophyllite.

A8N-06XVeszelyite (Cu,Zn)₂Zn(PO₄)(OH)₃·2H₂O , Hemimorphite Zn₄Si₂O₇(OH)₂·H₂O

Sanguozhuang, Dongchuan District, Kunming, Yunnan, China

Dimensions: 31 mm x 25 mm x 24 mm
Largest Crystal Size: 4 mm

Rich pocket of veszelyite on white hemimorphite. The dull light blue color on the crystal tips isn't damage; it's likely a second-generation of veszelyite.

E7J-JPECavansite Ca(VO)Si₄O₁₀·4H₂O , Stilbite-Ca NaCa₄(Si₂₇Al₉)O₇₂·28H₂O

Wagholi Quarries, Wagholi, Pune District, Pune Division, Maharashtra, India

Dimensions: 2.2 cm x 2 cm x 1.6 cm

Spherulitic rosette of canvasite with stilbite crystals.

W69-D5LQuartz (Var: Chalcedony) SiO₂

Cerro de San Pedro, Cerro de San Pedro Municipality, San Luis Potosí, Mexico

Dimensions: 10.3 cm x 5.3 cm x 4.3 cm

Botryoidal chalcedony collected by one of the locals of Cerro San Pedro. It is unusual to find specimen of this locality available.

AK3-J6AFeldspar Group (Var: Perthite), Amphibole Supergroup AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

Bancroft area, Ontario, Canada

Dimensions: 8.5 cm x 5 cm x 5.5 cm
Largest Crystal Size: 4 cm

Intergrowth of albite (var:peristerite) with a microcline host, there are also minor amounts on black amphibole and red garnets (extremely difficult to spot, unless you are using a loop). Unfortunately, the seller didn't gave me more information about the locality.

CQ5-YN0Gold Au

Bella María, Bellamaría, Santa Rosa Canton, El Oro Province, Ecuador

Dimensions: 22 mm x 9 mm x 1.5 mm
Largest Crystal Size: 2 mm
Weight: 1.8 g

The specimen has been affected by the transport downstream, but still preserve the dendritic habit and contact twin on {111}. Overall, it is a very big gold flake for this area.

RPH-8FDDatolite (Var: Bakerite) Ca₄(H₅B₅Si₃O₂₀) , Calcite CaCO₃

Charcas, Charcas Municipality, San Luis Potosí, Mexico

Dimensions: 6.2 cm x 5.8 cm x 3 cm

Nodules of bakerite on colorless scalenohedrons of calcite, the material is a bit different from the golden tan crust covering nifontovite reported by Peter Megaw. The bakerite was confirmed with XRD and visual identification ( material resembling unglazed porcelain), the quality of the diffraction wasnt good enough to differentiate between bakerite and datolite.

YQ9-9TAAdamite (Var: Copper-bearing Adamite) (Zn,Cu)₂AsO₄OH , Calcite CaCO₃ , Limonite

Ojuela Mine, Mapimí, Mapimí Municipality, Durango, Mexico

Dimensions: 13.6 cm x 7 cm x 3.8 cm
Largest Crystal Size: 4 mm

Fanlike rosettes aggregates of cuprian adamite on gossan matrix, there is also minor amount of calcite.

9Y8-4WWDatolite CaB(SiO₄)(OH) , Calcite CaCO₃ , Pyrite FeS₂

Charcas, Charcas Municipality, San Luis Potosí, Mexico

Dimensions: 11 mm x 8.7 mm x 4.5 mm
Largest Crystal Size: 30 mm

Prismatic crystals of datolite with lenticular calcite and pyrite.

KUX-JRRPrehnite Ca₂Al₂Si₃O₁₀(OH)₂ , Diopside CaMgSi₂O₆

Jeffrey Mine, Val-des-Sources, Les Sources RCM, Estrie, Québec, Canada

Dimensions: 7.8 mm x 5.7 mm x 3.8 mm
Largest Crystal Size: 14 mm

White prehnite covered with brown diopside.