Stones(for two models): 1.3mm - 10 // it may be 1.2mm or 1.5mm as you want // 5 or 6mm pearl - 2
Volume: 236.3+236.3 = 472.6 mm3.// without pearls and stones//
Here is two .max files: for max 2014 and max 2011. No .stl files included, because of BIG individuality of print-prepair process for each 3d printer, material etc. Nothing special inside, maximum versatility.
In .max file here is only ONE model. How you want - it will be right or left earring. Second mirrored part will be made in print-prepare process, as usual people do it :)