Novácekite

  

Origin: Pedra Preta Pit, Brumado Mine, Brumado, Bahia, Brazil

Sample size: 2.7 x 1.5 x 1.5 cm

 

Photo courtesy of: 

Very rare, small green crystals on matrix (Lit. Ref. Aufschluss 2/2000)

Origin: Grube Wildermann near Müsen, Siegerland, Germany

Sample size: micromount

 

Origin: Brumado, Bahia, Brasil

Sample size: 0.8 x 1.0 cm

 

Photo courtesy of: 

Novácekite under SW-UV light

Origin: Chihuahua, Mexico

Owner: Axel Emmermann

 

This specimen reacts a bit strange to ultra-violet. Most uranium minerals that are fluorescent have their strongest response under long wave UV. Novacekite seems to have a different taste! Under short wave the typical green color appears.

Photo courtesy of: 

Homepage

  

1.1 cm crystal of navacekite on a matrix comprised of magnesite crystals

Origin: Brumado, Bahia, Brazil

Sample size: 9.3 x 4.5 cm

 

Photo courtesy of: 

Origin: Pedra Preta Mine, Brumado, Bahia, Brazil

Sample size: Yellow micaceous crystal to 2 cm

 

  

Vivid yellow botyroidal crystals covering much of granite matrix.

Origin: Paguate, Valencia Co., New Mexico, United States

Sample size: 10 x 6 x 4 cm

 

  

 

  

Bright, canary yellow, thin palty, crystals to 2 mm.

Origin: Potosi mine, Santa Eulalia, Chihuahua, Mexico

Sample size: 6 x 7 x 2 cm (top), 7 x 5 x 3 cm (bottom)

 

Photo courtesy of: