often with white banding

Kyanite is a silicate mineral with the chemical formula Al2SiO5

Bead Size: 8x5 to 9x5 mm

Molybdenite

Azuara Basal Breccia | 110 Grams | Rubielos de la Cerida Impact Structure, Spain Impact Melt Rock often with white bandingThe Azuara Basal breccia refers to the impact material from the 38 million year old twin (multiple) impact structures Azuara Rubielos de la Cerida in Northern Spain,. This impact breccia was found on the southwestern central uplift chain between Villarquemado and Celadas. This amazing specimen displays sharp edged rock fragments imbedded in a matrix of pulverized rocks. This beautiful and colorful slice has dimensions of 87x81x11 mm and weighs 110