Description: This is the special mineral specimen from famous Champion mine, California, USA. This specimen mainly consists of well formed quartzs which up to 3.2 cm high and many yellow brown Svanbergite (a relatively rare strontium aluminum phosphate sulfate hydroxide). For this mineral specie, they are very good Svanbergite crystals, also associated with few smaller rutile and topaz crystals on matrix. Maybe mined out around 1920-1930. From Kay Robertson collection.