Mookaite Jasper is a physically stabilizing stone thought to boost the immune system and help counter the effects of aging. It is considered highly restorative for tissue deterioration of the internal organs, and useful in treating cystitis, high blood sugar, and disorders of the kidneys and bladder.
The crystal pictured is the one you receive. 
1069g 
130.5mm x 87.2mm x 53mm
All measurements are approximate