Fluorescent granite
15-Jul-94 00:13:53
Sb: #137320-Fluorescent granite
Fm: Lanny R. Ream 73512,1163
To: Doug Mitchell 70621,702
The best fluorescent phantoms in quartz I have are from Green Ridge, apparently
some quartzes from other King Co., WA localities fluoresce but I didn't notice
any in a quick check of my mineral drawers. Those that fluoresce from Green
Ridge typically show multiple phantoms but under white light there is nothing
or may be some milkyness–but not showing a phantom. The fluorescent color is
yellowish. The locality is a breccia pipe in a diorite batholith and the quartz
is hydrothermal.
The stilbite fluoresces a creamy color on edges and sometimes on a main "prism"
face. These are slightly weathered and don't appear to be coated with anything.
The stilbite is typically on a tiny quartz druse on a bluish agate. Amongst the
quartz, spots of something fluoresces bright yellowish but it is not obvious
what is fluorescing.
Looking at these, going over my collection I have found a lot more fluorescent
calcite than I was aware of–some nice light oranges, creamy colors, reddish
colors, etc. Nice stuff! Also discovered something I had forgotten–a lot of
microcline fluoresces bright red!
Lanny