Rhodium will not tarnish,it is probably silver plated.
Some type of quartz,you can see crystal pockets in a number of them.
Looks like it was made with sheet metal and not cast in the photos.There is nothing in the photos to suggest a time period,the boxes are still...
We visited the Crabtree mine years ago and have a few pieces of emerald in matrix. Victoria was popular at one time with a lot of misleading...
Looks like brass and dyed crushed material the same as the "heishi"disc.
Photo not in focus,can't even guess what they are.
With the excess solder in the joints and extreme file marks,it's hard to say who made it.It could have been made in an area with limited tools or...
Photos?
When I worked for a living we only did repairs on the companies products,everything else went to a repair shop. Amateurs are usually told not to...
Looks like something a student/hobbyist made.
It could be Murrine glass ....... https://twistedsifter.com/2014/06/this-is-murrine-its-made-of-glass-and-can-be-sliced-like-a-loaf-of-bread/
No idea,it has been tumbled and there is no crystal structure.What does your gem tester say?
What does the front look like?
Looks like an osprey tail feather.
What size is the stone?
Is it yellow gold or red gold?
Looks like someone wasn't experienced with casting,bad case of porosity.
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It was sized up a few sizes,you can see the solder lines.
Looks like tiger iron.
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