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#1

JD Gold
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From: Adelaide, SA
Joined: 12 October 2015
Posts: 44
Member
09 October 2016 07:34 pm

Out walking today and found some interesting ground packed with rocky patches of this. Some nice chunky quartz loaded with what I'm guessing is pyrites or galena and ironstone, some nice clear crystals and plenty of rusty quartz also. I couldn't seem to locate actual veins still grounded though lots of scattered broken up chunks at the top of the ridge.

1476001565_img_1883.jpg
1476001566_img_1884.jpg
1476001567_img_1885.jpg
1476001568_img_1886.jpg

3 users like this post: Wally69, Chewy, AtomRat

#2

jethro
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From: North East , VIC
Joined: 06 September 2013
Posts: 342
Member
09 October 2016 10:33 pm

Im thinking the black mineral in the top 2 pics is Tormaline. Or perhaps Stibnite. Stibnite will supposedly fuse / melt in a match flame giving off a blue white sublimate.

Last edited by jethro (09 October 2016 10:34 pm)

1 user likes this post: JD Gold

#3

Heatho
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From: Sydney, NSW
Joined: 29 April 2013
Posts: 8,924
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10 October 2016 09:36 am

My guess is Molybdenite.


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1 user likes this post: JD Gold

#4

JD Gold
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From: Adelaide, SA
Joined: 12 October 2015
Posts: 44
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10 October 2016 04:02 pm

Thanks for your suggestions. These were found in the Adelaide Hills within a stone's throw of some old workings. Historical documents outline primary commodity being Gold with small amounts of Copper and Silver also dig up. I think I'll be back soon for further investigation. Fingers crossed!

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#5

Tathradj
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From: Tathra, NSW
Joined: 17 February 2014
Posts: 5,432
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16 December 2016 11:23 pm

Mine too.
Gold is associated with this mineral and also silver.
How much of it is lying around. ?
Keep an eye out for big black soft dark rocks.
They will be solid ore.
Not likely but quite feasible. smile smile

Heatho wrote:

My guess is Molybdenite.


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#6

JD Gold
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From: Adelaide, SA
Joined: 12 October 2015
Posts: 44
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17 December 2016 05:55 pm

1481955558_img_2607.jpg

A great day out today with the family and in the same area as where my original rocks were found. Came across a nice vein of quartz that was what seemed quite foliated? It was heavily streaked with these lines of very red soft material running throughout. I took a sample and plan to crush tonight to see what pans out?

7 users like this post: goldengoose, Heatho, BillS, stoyve, RM Outback, AtomRat, silver

#7

AtomRat
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From: Katazone, VIC
Joined: 22 May 2014
Posts: 5,002
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18 December 2016 12:52 am

I think your sample rock up the top is galena as well mate. Will be interesting to see what comes out of the big chunk you got there! Im not totally positive of the soft red but possibly oxodised pyrites / sulfides turned to rust or a felspar decomposing. I think i can see some dots of malachite in there too! It could be a bit of slicken slide fault or more laminated, rather than foliated. Lets hope some nice stuff appears!


Wisdom is knowing how little you know

1 user likes this post: JD Gold

#8

goldierocks
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Joined: 10 January 2015
Posts: 253
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28 December 2016 06:30 pm

Almost certainly tourmaline, the variety known as schorl, and almost certainly not galena. You can scratch molybdenite with your fingernail, galena not with your fingernal but with a "gold" (i.e. $1, $2) coin, tourmaline not with a coin or a steel pocketknife but sometimes using quartz (with difficulty). Tourmaline also has a hardness that varies with the direction that you scratch (across or parallel to elongation). Powdered it (tourmaline) will probably turn a candle flame green (the others will melt and sputter). Molybdenite will leave bluish-black to black streaks when rubbed on the surface of broken porcelain, tourmaline will probably just scratch the porcelain rather than vice-versa.


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1 user likes this post: Hunting the yellow

#9

Hunting the yellow
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Joined: 20 December 2012
Posts: 1,372
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31 December 2016 01:25 pm

goldierocks wrote:

Almost certainly tourmaline, the variety known as schorl, and almost certainly not galena. You can scratch molybdenite with your fingernail, galena not with your fingernal but with a "gold" (i.e. $1, $2) coin, tourmaline not with a coin or a steel pocketknife but sometimes using quartz (with difficulty). Tourmaline also has a hardness that varies with the direction that you scratch (across or parallel to elongation). Powdered it (tourmaline) will probably turn a candle flame green (the others will melt and sputter). Molybdenite will leave bluish-black to black streaks when rubbed on the surface of broken porcelain, tourmaline will probably just scratch the porcelain rather than vice-versa.

dam finally truck load of likes to you sir I was a bit slow on seeing this but you are 100% right on tourmaline for the tops images well done mate wink


.

#10

Hunting the yellow
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Joined: 20 December 2012
Posts: 1,372
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31 December 2016 01:28 pm

I've found loads of this tourmaline while looking for other gemstones you find it near granite also a great indicator or a vugh or pegmatite deposit nearby that could contain crystals


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