Aussie Lapidary Forum

LAPIDARY => Ask a "Silly" Question => Topic started by: tinker on April 22, 2015, 07:49:41 PM

Title: Peridot
Post by: tinker on April 22, 2015, 07:49:41 PM
Just a silly question, I've just spent the last two days breaking open the last of my peridot bombs from Mt Shadwell, in one of the bombs amongst the peridot, I found to very clear crystals.  Could anybody suggest what they might be.
Title: Re: Peridot
Post by: fossickeract on April 22, 2015, 07:58:50 PM
Hi Tinker,
     Most likely one of the feldspars like labradorite or andesine.     beers Ted
Title: Re: Peridot
Post by: gammyknee on April 22, 2015, 10:04:11 PM
Maybe Ted...... but also need to consider/eliminate Chabazite or Calcite. Photos might help get closer to what it might be.

Title: Re: Peridot
Post by: Lapis Lupinus on April 23, 2015, 07:08:21 PM
..anorthoclase feldspar. It's found there and at Mt Franklin (a couple of hours drive east). If it has a sheen then it's quite likely. ;D
Title: Re: Peridot
Post by: tinker on April 25, 2015, 08:59:36 AM
Thanks for the response guys, I have attached a couple of pictures of the clear crystals, don't know whether they are clear enough to identify.
Title: Re: Peridot
Post by: tinker on April 25, 2015, 09:03:38 AM
And a couple more
Title: Re: Peridot
Post by: pegatha on April 25, 2015, 07:28:34 PM
Last trip to Mt Shadwell I managed to pick up two of the clear crystals a nice size but they had fracture lines that formed squares. I hope that helps. beers
Title: Re: Peridot
Post by: Lapis Lupinus on April 25, 2015, 08:38:46 PM
Tinker, from the look of them, it looks like anorthoclase feldspar.
Title: Re: Peridot
Post by: tinker on April 26, 2015, 12:24:06 PM
Yes pegatha, thats what the crystals are like, thanks for the info guys.