I don't know why I was surprised to see this in the amethyst. Rutile is common enough in quartz. I had just never seen it before. This stone comes from SRI LANKA. There are also lots of little rectangular crystals but I don't know what they are. Anyone?
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It is strange, but rutile in amethyst is unusual to the point of being unheard of. Even though the form would be unusual, I'd guess those are needles of yellow goethite rather than rutile--the way they radiate from a single point, plus the association with the spheres of hematite (along with goethite being a classic in amethyst) point in that direction. Still, even if I'm right it's an unusually excellent example.
Joined: Tue Apr 05, 2016 7:58 pm Posts: 1424 Location: San Marcos, CA
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Several years back I slabbed a Quartz point section and found the following through out the pieces. This pic was taken just with a low end macro camera, I can only imagine what it would like in an image with one of your scopes. Any Ideas on these needles?
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