I collect gems and preferably in the black opal from Australia but also opals from other countries. And that the others have written, it is difficult to determine from the photo / video and I have a hard time getting it to Opal, but without polish/cut to mutch, can you try to do one or two facets ..vinkla o lighting with light / sun and the black / white background … nice if you could take pictures then, you see a little redwill increase the chance otherwise think probably is it tourmaline ,, crystal structure! ??
anyway .. It´s very nice at the photo/video 😉
best of luck Sten (Yup, thats my name:) )