This is such a sparkly pyrite egg in which the hundreds of sparkly caves really contrast with the polished egg shape. It's really quite heavy in your hand and just amazing to look at.
Every time you turn it around there's something else to look at, a different little cave full of silvery pyrite columns. It's just gorgeous - the photos SO don't do it justice!
It measures approximately 6.5cm from end to end, and is about 5cm across its middle.