What stone is this?

[Iloveshinythings]

Hello. Can anyone help me figure out what stone this is?

 

[Gemobsessed]

They look like lovely natural zircons !!

 

[chatoyancy]

Another vote for blue zircons. Lovely!!

 

[pwsg07]

treated blue diamond or blue zircon.

 

[memorystation]

looks like blue zircon to me.

 

[chatoyancy]

treated blue diamond or blue zircon.

I almost said also could be treated blue diamond. My zircon ring has treated blue diamond in the setting. They do look alike.

 

[pwsg07]

An easy way to tell is to check the double refraction using microscope.

 

[Turbodoug]

Could be tourmaline but i suspect zircon

 

[LD]

They could also be apatite. Zircon or apatite.