In this wheel there are 24 oval nail decorations, 12 colours.
They are quite large: 8mm long, 6mm wide and 3mm deep.
These are something different as most of the 3D gems are rounded more like a cabochon than these are. They are one colour with light shimmer / glitter running through them, which again is something different to the normal nail decorations you can get.
Jess - Midnight
R&R Lacquers - Bewtiching
Revlon - Steel Her Heart
Yellow Accents Nails:
Photo showing the 3D