Cast Marble Tests Ready

My first cast tests came out this afternoon. 

I'm pleased with the way the glass has mixed within the mould. I got a little bit worried after I had already put them in that I should have been melting the glass in through a plant pot. I knew that I didn't want them to be really swirly though but I wasn't really sure what to expect. In the end though it has all went okay. 

The two on the left (a) have 15g of grey and 1g of black, the two in the middle (b) have more grey (20g), and the two on the right (c) have more black (2g). They all have 120g of white. 

Set (a). 

Set (b). 

Set (c). 

I don't really have any preference, I don't think the amounts of colour in them help to differentiate them. If I had to chose I would say the bottom cast in the photo of set (b) is the best as the colours have mixed in a more feathery (but not swirly) way.