Size: 40mm by 20mm 

Colour: natural gold, green, purple and pink (no dye or treatments) 

Shape:  hard to describe..look at the photo

Surface: fairly smooth

Lustre:  satin/metallic

Drilled? undrilled

selected by Pearlescence. Defies categorisation. Definitely a one-off. Flat to base. Would set as a fabulous pendant perhaps.