2007-03-17 18:09:07 · 10 answers · asked by jakeinky502 2 in Science & Mathematics ➔ Earth Sciences & Geology
a geode
2007-03-17 18:11:50 · answer #1 · answered by dirka 3 · 3⤊ 0⤋
Probably it is amethyst. However, it could be fluorite, which is calcium fluoride (CaF2). To check that possibility use an ultraviolet light on the purple mineral inside. If it fluoresces it is fluorite. If it does not fluoresce it is probably amethyst. There will be no doubt if the mineral fluoresces, it will be much brighter than only a reflection.
Alternatively, if you don't have an ultraviolet light, and if the crystals are free inside the rock (like a geode) look at their symmetry. Amethyst (which is the mineral quartz) has six-sided (sometimes three, depending on the physical and chemical environment when it was deposited) sided crystals, which meet at angles other than 90 degrees, whereas fluorite has sides that meet at 90 degrees, and the common crystal form is a cube. Basically if it doesn't look like some form of a cube, the crystals are probably amethyst.
2007-03-18 12:07:45 · answer #2 · answered by David A 5 · 1⤊ 0⤋
Amethyst Geode
2007-03-18 01:14:03 · answer #3 · answered by Jon's Mom 4 · 2⤊ 0⤋
Amethyst?
2007-03-18 01:11:19 · answer #4 · answered by jammer 6 · 1⤊ 0⤋
i have a feeling that it is most probably a Amethyst rock.
2007-03-18 04:52:49 · answer #5 · answered by tezy 2 · 0⤊ 0⤋
amathist or flourite. Can't tell from the info you gave out but these are aome common ones.
2007-03-18 19:04:44 · answer #6 · answered by Texan23 2 · 0⤊ 0⤋
an elemental rock
2007-03-18 01:11:24 · answer #7 · answered by Anonymous · 0⤊ 2⤋
Is it an amethyst?
2007-03-18 01:12:22 · answer #8 · answered by christina rose 4 · 1⤊ 0⤋
it is a magic stone. choose you three wishes very carefully. say nothing to anyone. speak and no magic. okay? please use one wish for me. i need extra money fast. okay?
2007-03-18 01:12:37 · answer #9 · answered by hillary c 2 · 1⤊ 2⤋
a crack rock
2007-03-18 01:11:49 · answer #10 · answered by frigig 1 · 0⤊ 2⤋