Occurs in multi-color transparent masses up to 5 cm, exhibiting perfect octahedral cleavage with a glassy luster on the cleaved surfaces. crystals are zoned parallel to the {111} cleavage direction from a small (1 cm) pale green-yellow core, to a main zone(2 cm) of an "ice-blue" color. Crystals able to continue growth into an open vug grade into a more common purple color. Crystals from this thin (0.5 cm) purple zone continued, producing cubic crystals from 1 mm to 1 cm across, zoned with altering bands of pale to medium color parallel to the (001) faces, thus the habit appears to have switched from octahedral to cubic at some time during formation of the intermediate blue zone. In narrower portions of the vein, color transition was directly from green to purple. Rare, primary, two-phase fluid inclusions and more common secondary inclusions occupying healed fractures along cleavage planes have been observed, with secondary inclusions containing gas and liquid in various ratios. Fine crystal are uncommon.
Habit:
Occurs in multi-color transparent masses, octahedral cleavage, cubic crystals from 1 mm to 1 cm across, Rare, primary, two-phase fluid inclusions and more common secondary inclusions occupying healed fractures along cleavage planes. Fine crystal are unco
Colour:
pale green-yellow, pale blue, pale to medium purple
Luminescent properties:
none noted
Quality for species:
Poor for species, only of interest for locality collectors. (#)
New Paris Lime and Stone Co. Quarry, New Paris, Napier Township, Bedford County, Pennsylvania, USA