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#1676

Billy
Member
From: There or here., NSW
Joined: 09 August 2013
Posts: 939
Member
11 July 2018 11:04 pm

Nice one Wally!!

I like the "ridge" on the top of that pretty rock. cool

Great time of year to be anywhere under the Aussie cross thumbsup


You can lead a horse to water, but it needs to be thirsty to drink!

#1677

Heatho
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From: Sydney, NSW
Joined: 29 April 2013
Posts: 12,169
Moderator
12 July 2018 09:19 am

Geez mate, that's a decent trip. Pity Shauno is out prospecting for gold at the moment, he likely would have been more than keen to catch up and show you around.

Nice stone.


Minelab GPX 5000, SDC2300, CTX3030, Equinox 800, patience, lot's of patience.

#1678

Lefty
Member
Joined: 01 May 2014
Posts: 1,448
Member
12 July 2018 10:27 am

Looks like a nice find there Wally thumbsup

Can't really tell from the photo - is it worth doing anything with? I can see what look like some nice flashes of colour.

#1679

RockRat
Member
Joined: 26 May 2018
Posts: 25
Member
12 July 2018 11:18 am

1531354311_imag4382.jpg

Found a few of these yesterday, not clear ,more yellow in color,
others iv'e found were clear.color change in the clay, a gemologist
friend said they were ..Jack Straw Crystals. Anyone one heard
of that term. thanks in advance.

6 users like this post: 7.62marksman, aussiefarmer, Billy, jimnyjerry, ktmman, Chiron52

#1680

Heatho
Moderator
From: Sydney, NSW
Joined: 29 April 2013
Posts: 12,169
Moderator
12 July 2018 11:39 am

Never heard of that name before but I love rutilated or tourmalinated quartz, very nice.


Minelab GPX 5000, SDC2300, CTX3030, Equinox 800, patience, lot's of patience.

#1681

goldierocks
Member
Joined: 10 January 2015
Posts: 690
Member
12 July 2018 12:10 pm

Heatho wrote:

Never heard of that name before but I love rutilated or tourmalinated quartz, very nice.

Jackstraw refers to the shape of the inclusions, not the mineral - they can be all sorts of things (tourmaline, rutile, epidote). Interesting specimen.


Robert Benchley...
I have kleptomania, but when it gets bad, I take something for it.

1 user likes this post: Heatho

#1682

RockRat
Member
Joined: 26 May 2018
Posts: 25
Member
12 July 2018 01:18 pm

thanks for that, so what are the shapes goldilocks,,
the difference i can see with others i find is that
the tourmaline is scattered in the crystal, others
have the tourmaline coming from the bottom.

#1683

RockRat
Member
Joined: 26 May 2018
Posts: 25
Member
12 July 2018 01:21 pm

1531362001_imag3150_1.jpg1531362036_imag3145_1.jpg

A few more .

11 users like this post: aussiefarmer, Bluecurrant, Diggerman60, Dave79, Billy, Heatho, jimnyjerry, Wally69, ktmman, 7.62marksman, Chiron52

#1684

goldierocks
Member
Joined: 10 January 2015
Posts: 690
Member
12 July 2018 01:50 pm

RockRat wrote:

thanks for that, so what are the shapes goldilocks,,
the difference i can see with others i find is that
the tourmaline is scattered in the crystal, others
have the tourmaline coming from the bottom.

Jackstraws? Like long thin tubes or straws or hairs. The position simply depends on when the tourmaline started or stopped growing relative to the quartz. The silicon that forms quartz is unlikely to become depleted in the solution from which the quartz is growing, compared with things like sodium, iron, boron and aluminium which are required in addition to silicon to form tourmaline. It could conceivably also be a temperature effect due to cooling of the fluid (quartz will tend to crystallize down to low temperatures, probably tourmaline will not). Since the fluid will be water, the oxygen and hydrogen required for these minerals will always be present.

Nice specimens!


Robert Benchley...
I have kleptomania, but when it gets bad, I take something for it.

1 user likes this post: Heatho

#1685

Lefty
Member
Joined: 01 May 2014
Posts: 1,448
Member
12 July 2018 02:19 pm

Neat specimens thereRockrat! thumbsup

#1686

RockRat
Member
Joined: 26 May 2018
Posts: 25
Member
16 July 2018 11:28 pm

1531743790_imag3181_1.jpg1531743831_imag3278_1_1.jpg

A cluster coming out a couple of weeks ago,
soak the ground so don't break. like the mud smile

4 users like this post: ktmman, 7.62marksman, PabloP, Chiron52

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