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| Author: | Barbra Voltaire, FGG [ Fri Feb 23, 2018 12:28 pm ] | ||||||
| Post subject: | Identification requested | ||||||
I got an email this morning from a gal who inherited several minerals and wanted our help in identification:
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| Author: | Stephen Challener [ Sat Feb 24, 2018 8:26 pm ] |
| Post subject: | Re: Identification requested |
1: ??? 2: ??? 3: tourmaline on matrix 4: ??? 5: gotta be beryl or apatite, probably. 6: ??? probably quartz but not enough focus to make out crystal form 7-10: tourmaline |
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| Author: | Jason Barrett [ Tue Feb 27, 2018 2:22 am ] |
| Post subject: | Re: Identification requested |
Lets see... 9 and 10 seem like they could be the same crystal at different angles. Tourmaline, like Stephen said. 7 and 8 are tourmaline with 8 having cleavelandite on it, I think. 5 looks like beryl, as Stephen mentioned. 6 looks like those clusters of quite rare pink quartz crystals, that usually come from Brazil or Maine. 3 is clearly pink tourmaline spray in matrix. 4 is not...well...hmmm...sort of looks like an apatite crystal to me, laying on it's side, with it's termination on the right side and it's base on the left. It seems like it's been broken in half and sitting on the broken side as is. 2 might be epidote crystals, since the classic epidote-like striations seem present, and the fact some are bent crystals helps to make me think epidote. How about the green zoisite like that from pakistan?? Nah...epidote Number 1 ...is a complete guess pretty much...pollucite? |
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| Author: | cascaillou [ Wed Mar 14, 2018 12:47 pm ] |
| Post subject: | Re: Identification requested |
before thinking of rare or precious species, I always consider common ones, for instance fluorite as number one (although I wouldn't rule out beryl), and maybe actinolite as number two. But it's hard to tell (pics are a little too blury to show details such as cleavages, and basic hardness test -against copper and glass at least- would always help to rule out a few candidates) Tourmalines (pink and black) are quite obvious (3, 7, 8, 9, 10) , 6 is quartz, and number 5 is most likely either apatite or beryl For number 4 I will refrain from suggesting a handful of candidates (useless without further testing), but I'll outline that, from the picture, it seems to show adamantine or sub-adamantine luster (suggesting rather high RI), which (if that is correct interpretation of the pic) should narrow the choice. |
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