Sainte-Claire Deville, on account of the uniform density of the oxide before and after fusion ... presenting most of the properties of the ruby, but differing from the natural product by the ...

So [NightHawkInLight]’s recipe starts with aluminum oxide grit-blasting powder and ... [NightHawkInLight] was rewarded with a large, deep pink ruby. This looks like a fun, quick little project ...

We assume the ruby — which is just aluminum oxide — is lab-created and not a natural stone. Another common option is to go with hardened steel nozzles, but Olsson claims the brass nozzles ...