Trolleite Crystal Heart

Trolleite is an extremely rare aluminum phosphate mineral that crystallizes in the form of masses and small prismatic crystals. ... The mineral was originally found in Sweden in 1868, and was named after the famed chemist and attorney general, Hans Gabriel Trolle-Wachtmeister. More recently it has been discovered in Australia, Rwanda, Brazil and the USA. 

Trolleite is often associated with other phosphate minerals such as augelite, lazulite and scorzalite, the later often resulting in a very blue colour.

Scorzalite is a dark blue phosphate mineral containing iron, magnesium, and aluminium ... Associated minerals include souzalite, triphylite, wyllieite, trolleite ...

Optical properties: Biaxial (-)

Mohs scale hardness: 6

Crystal system: Monoclinic

Crystal class: Prismatic (2/m); (same H-M symbol)