bump

Bogsnorkler said:

bump

So, you reckon it is tourmaline?

no, i said i think it is. and explained how i came to that conclusion. also i am not going to play 20 questions with you. if you have something to add then do so.

Bogsnorkler said:

no, i said i think it is. and explained how i came to that conclusion. also i am not going to play 20 questions with you. if you have something to add then do so.

OK. Well I can tell you that if it is black or brown tourmaline, it is not particularly valuable even if it was flawless. There isn’t a market for black diamonds or sapphires either.

http://www.minerals.net/mineral/tourmaline.aspx

roughbarked said:

Bogsnorkler said:

no, i said i think it is. and explained how i came to that conclusion. also i am not going to play 20 questions with you. if you have something to add then do so.

OK. Well I can tell you that if it is black or brown tourmaline, it is not particularly valuable even if it was flawless. There isn’t a market for black diamonds or sapphires either.

http://www.minerals.net/mineral/tourmaline.aspx

i don’t want to sell just know what it might be.

Bogsnorkler said:

roughbarked said:

Bogsnorkler said:

no, i said i think it is. and explained how i came to that conclusion. also i am not going to play 20 questions with you. if you have something to add then do so.

OK. Well I can tell you that if it is black or brown tourmaline, it is not particularly valuable even if it was flawless. There isn’t a market for black diamonds or sapphires either.

http://www.minerals.net/mineral/tourmaline.aspx

i don’t want to sell just know what it might be.

Are you telling me you didn’t want a question you didn’t ask answered?

Bogsnorkler said:

roughbarked said:

Bogsnorkler said:

no, i said i think it is. and explained how i came to that conclusion. also i am not going to play 20 questions with you. if you have something to add then do so.

OK. Well I can tell you that if it is black or brown tourmaline, it is not particularly valuable even if it was flawless. There isn’t a market for black diamonds or sapphires either.

http://www.minerals.net/mineral/tourmaline.aspx

i don’t want to sell just know what it might be.

The tourmaline link may help you with that.

Zircon is tetragonal. http://www.minerals.net/mineral/zircon.aspx

Tourmaline.

https://www.mindat.org/min-4003.html

Turn the 3-D crystal model to the 3-faceted end and you’ll see it’s crystalographically identical (although the axis is relatively shorter on your specimen).

By the way – your photos were an excellent help to identify the specimen.

Michael V said:

Tourmaline.

https://www.mindat.org/min-4003.html

Turn the 3-D crystal model to the 3-faceted end and you’ll see it’s crystalographically identical (although the axis is relatively shorter on your specimen).

By the way – your photos were an excellent help to identify the specimen.

Ta MV.

Apparently tourmaline is found in a number of places in WA.

Large crystals of black tourmaline (schorl) are a common accessory in muscovite-bearing pegmatite bodies in the Yinnetharra area. In the Cairn mining area (24: 2148). which is 14 km northwest of Yinnetharra Homestead, 1035 kg of schorl realized $2123 during 1972 and 1973.

http://lapidaryworld.com/pdf/gemstoneswa.pdf

> Tourmaline

My first thought was tourmaline, too. But it’s too bl&* big for that, isn’t it? Tourmaline tends to appear most often in needle-like crystals about a mm or two across.

Have you checked the crystal’s symmetry group?

mollwollfumble said:

> Tourmaline

My first thought was tourmaline, too. But it’s too bl&* big for that, isn’t it? Tourmaline tends to appear most often in needle-like crystals about a mm or two across.

Have you checked the crystal’s symmetry group?

http://www.aradon.com.au/black_tourmaline.html

Doesn’t seem to quite match anything.

Edenite or some bullshit amphibole like that.

An outside bet might be a dark garnet such as melanite

Quite a number of Tourmaline crystals, some very similar to yours.

http://www.mineralminers.com/html/tourmaline_crystals.stm

PermeateFree said:

Quite a number of Tourmaline crystals, some very similar to yours.

http://www.mineralminers.com/html/tourmaline_crystals.stm

For what it is worth, Tourmaline crystals (including green ones) are quite common in Australian pegmatites, although usually thinner and longer, with the black ones commonly growing at all angles and of no use.

>>A simple granite pegmatite may contain only quartz, feldspar , and mica. More complex pegmatites are often zoned and can contain minerals like tourmaline, garnet, beryl, fluorite, lepidolite, spodumene, apatite, and topaz. Pegmatites are formed as part of the cooling and crystallization process of intrusive rocks.<<