David, these stones are yakut.
Yakut is rose-cut rock crystal.
The low quality diamonds that they use in Indonesia are called "inten", or
"intan" in Jawa. They are much, much more expensive than yakut.
Regarding red stones, "mirah" are properly rubies, but the fact of the matter is that in the markets the sellers will call just about any red stone "mirah".
Ferry, I cannot really comment on the iron from a photo.
Would it be possible to provide a photo looking straight down onto the sirah cecak?
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