inclusions

[Bobby]

Hello,I need help getting clarity on inclusions.Are these inclusions finger print inclusions.These are inclusions in an amethyst.

[Barbra Voltaire, FGG]

I'd like a little more information on the specimen.
Picture of the actual stone....without magnification.
Polariscope reaction....looking for twinning?
Refractive index?

[Bobby]

Thank you for replying.I heard about twinning but dont know how it looks under a microscope or exactly what it is.im just trying to recognize inclusions better.This is a purple stone amethyst .

[Bobby]

Some more inclusions.What could these be.Fingerprint inclusions or something else.Its a ruby .

[Bobby]

the stone

[Bobby]

I cannot measure refractive index as i do not have the necessary instrument.one more picture of the amethyst its like v shaped.is it polishing lines .

[Barbra Voltaire, FGG]

I do not see anything diagnostic in the inclusions you posted to allow identification.
Gem identification requires a series of tests, essentially to rule out possibilities.

Twinning is most easily seen with a polariscope, or presence of "tiger strip" inclusions which can sometimes (not always) be seen with amethyst.

Photo courtesy of Gem-A

[Bobby]

Thank you.So are they bubbles.The same kind seen on a natural ruby and the purple stone ,so i assumed its natural amethyst.The ruby is certified so when i saw similar inclusions assumed its a natural amethyst

[Bobby]

finally i saw the dangerous bubbles and wispy clouds in synthetic vernuil corundum ,hope this is the one.I just wanted to know if im supposed to see it in all vernuile synthetic corundum.What other inclusions are seen in synthetics.Thank you.

[Barbra Voltaire, FGG]

Depends on the synthetic.

https://www.gia.edu/gem-synthetic

https://www.aigsthailand.com/viewgaller ... Gems&Ins=1