You will receive one Black Onyx tumbled stone weighted in grams.
Sizes may look similar depending on shape/thickness.
Pictures taken both in natural and artificial lighting
 
Size options:
XS: 5g to 9g
SM: 10g to 15g
MD: 16g to 22g
LG: 23g to 29g
XL: 30g to 38g
 
Black Onyx: Solidifies your energy, compresses it, makes you stronger especially in the core. (Book II of the Creation series)