There are a few varieties that are found in Australia, the best of
which (IMHO) is called Mara Mamba, and is quite expensive. You may
have a variety called Tiger Iron. It’s matrix is complicated and it
can be quite hard, but the stone is primarily Golden Tiger’s Eye,
Red Jasper and Hematite. Outside parts of the matrix can also be
very soft, too. Yours may or may not be dyed. It would be
difficult/impossible to tell from a photo.
Tiger’s Eye (or Tigereye, Tiger Eye, etc.) is sometimes dyed or
bleached for different results. It is also heated to get the red
color and that can actually be done by anybody with a toaster oven
that can reach 400F. However, never try it with a piece you can’t
afford to lose. If you do decide to try, I’ve had some fun results
by surrounding a piece with sand in a pan and ramping the
temperature up to 400 over a period of 3 hours, holding for 2 hours,
and ramping back down for another 3. I’ve had varying results with
doing this. Tiger’s Eye sometimes comes out of the ground red in
color, but theories abound as to how the phenomenon occurred.
Whether from a natural geologic event, or as a result of burning the
local brush before mining, heat is generally considered the reason.
I am also becoming curious as to what localities tiger eye is
normally found in.
Sources include India, Sri Lanka, South Africa, Myanmar and, of
course, Western Australia. There is also a very interesting
chatoyant quartz from Arizona in the US that many refer to as
Arizona Tiger’s Eye. Blue varieties of Tiger’s Eye are often called
Bull’s Eye, or Falcon’s Eye. Some pieces are interspersed with gold
and blue, and are sometimes called Zebra Tiger’s Eye. My favorite
variety is Pietersite, which occurs as a sort of broken-up, or
brecchiated version in the familiar yellow/golden, red and/or blue.
Pietersite is sometimes referred to as Eagle’s Eye. Get yourself
some of this (if you can find some good quality) for a real treat!
James in SoFl