:cheers:
Congratulations on the first clutch, its exciting and worrying all at once.
When my snake had her first clutch (14 eggs) I didn't know if they where 'good' or 'bad' eggs, so I just put them in an incubator and hoped for the best. I had heard good eggs where round and quite big. After a few days the bad eggs (4) had gone mouldy. I read that if the eggs where fused together you could moisten the bad eggs and prise them gently apart, but I didn't do this as I was afraid of harming the remaining eggs. After checking the eggs every few days, sure enough about 56 days after the eggs had been layed they hatched, 10 beautiful babies.
Looking at your attachment I would say my eggs looked very much like yours.
I think you can shine a light through the eggs to see if they are fertile, but I dont know if it has to be a special light, so I hope if anyone else knows they can tell you.
Good Luck.