These look so much like a speckled bird's egg! They make really lovely focal beads, but remember sizes of beads may vary slightly as they are handmade in India.
Underneath is a solid opaque glass, with a speckled coating over the top - I have no idea how they make those speckles but they are very cute and interesting! A bit of a talking point when you wear earrings using these.
Measurements: 19mm long x 15mm wide with a threading hole of about 1mm to 1.5mm
Quantity per pack: 10 beads
Colour: Black with grey pattern over the top