Jeff Krueger's Photo Gallery

9CW-98LBaryte BaSO₄

Cheshire, New Haven County, Connecticut, USA

Largest Crystal Size: 6 inches

On display at the Joe Webb Peoples Museum, Exley Science Center, Wesleyan University, Middletown, Connecticut. Collection #1223.

Perhaps from Jinny Hill Mine.

7W7-WJGBeryl Be₃Al₂(Si₆O₁₈)

Case Quarries, Portland, Middlesex County, Connecticut, USA

Field of View: 13 inches

Specimen is on display at the Joe Webb Peoples Museum, Exley Science Center, Wesleyan University, Middletown, Connecticut.

Museum label only specifies Portland, Connecticut but previous Mindat photo (Photo ID: 77160) caption by Peter Cristofono assigns the specimen to Case Quarry based on 2016 communication with Harold Moritz.

AHY-PQ9Diaspore AlO(OH)

Chester Emery Mines, Chester, Hampden County, Massachusetts, USA

Field of View: 4 inches

Specimen is on display at the Joe Webb Peoples Museum, Exley Science Center, Wesleyan University, Middletown, Connecticut.

collected pre-1972 based on accession number.

L5X-2F2Spodumene LiAlSi₂O₆ , Muscovite KAl₂(AlSi₃O₁₀)(OH)₂

Huntington, Hampshire County, Massachusetts, USA

Field of View: 6 inches

Specimen is on display at the Joe Webb Peoples Museum, Exley Science Center, Wesleyan University, Middletown, Connecticut.

Terminated crystal is about 5 inches long.

NUU-WPJCahnite Ca₂[B(OH)₄](AsO₄)

Franklin Mine, Franklin, Sussex County, New Jersey, USA

Dimensions: 1.3 cm

Cahnite with twin crystal.

Ex Harvard University collection.

Collection of Peter Giangrande, Minneapolis, Minnesota, USA.

Photo Jeff Krueger. (Tough material to photograph.)

MCG-AN4Franklinite Zn²⁺Fe³⁺₂O₄ , Calcite CaCO₃

Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA

Dimensions: 7 cm x 7 cm x 5.8 cm

Franklinite octahedral crystal exposed from Calcite matrix.

Ex. Martin Zinn collection.

Collection of Peter Giangrande, Minneapolis, Minnesota, USA.

Photo Jeff Krueger.

QX8-PGTChalcocite Cu₂S

Flambeau Mine, Ladysmith, Ladysmith-Rhinelander Metavolcanic Complex, Rusk County, Wisconsin, USA

Dimensions: 5 cm x 7 cm x 5.5 cm
Largest Crystal Size: 17 mm

Irridescent pseudohexagonal crystals of chalcocite.

Collection of Peter Giangrande, Minneapolis, Minnesota, USA. Peter was a consulting geologist on the mining project.

Photo Jeff Krueger.

Mindat.org Photo of the Day - 12th Nov 2023

PEW-4FDAzurite Cu₃(CO₃)₂(OH)₂ , Malachite Cu₂(CO₃)(OH)₂

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia

Dimensions: 9 cm x 10.5 cm x 9 cm
Largest Crystal Size: 6 cm

Tsumeb Azurite specimen. Chisel shaped crystals to 6 x 2.5 x 1cm. Some alteration to Malachite.

Collection of Peter Giangrande, Minneapolis, Minnesota, USA.

Photo Jeff Krueger.

77E-7U3Marcasite FeS₂

Kleeberg Quarry, Lengerich, Steinfurt, Münster, North Rhine-Westphalia, Germany

Dimensions: 13 cm

Marcasite crystals in limestone matrix.

Ex. Bill Tislar collection.

Collection of Peter Giangrande, Minneapolis, Minnesota, USA.

Photo Jeff Krueger.

Q0X-C67Quartz (Var: Amethyst) SiO₂ , Quartz SiO₂

Jackson Crossroads Amethyst Mine, Jacksons Crossroads, Wilkes County, Georgia, USA

Dimensions: 15 cm x 12 cm x 8 cm

Amethyst crystals on a plate of smaller clear quartz crystals.

Ex. Bill Tislar collection.

Collection of Peter Giangrande, Minneapolis, Minnesota, USA.

Photo Jeff Krueger.