I am looking at a parcel of rubies. As a gemologist I note obvious discoid fractures, dissolved rutile needles, and melt relics. In some of the fractures and fingerprints I have made not of a liquid. I am slightly confused because I don’t understand how a heated ruby can appear to have liquid inclusions. When using oblique lighting I am able to get a violet to orange flash. ( have to try hard to get the flash ). I’m wondering if this is some type of filling used after heat treatment or if liquid inclusions can withstand heat treatment.
Any photos of similar inclusions would be greatly appreciated!
Thanks in advance for the advice.