Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Gemstones, Minerals & Fossils
Lapidary
Stones I have cut
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Lefty" data-source="post: 414442" data-attributes="member: 2976"><p>Cheers mate. Yeah, it just came in the little packet with the name and nothing else so I had to go searching so I could at least work out things like critical angles, best polishing agent etc.</p><p></p><p>The tiny bit of info I could find on it suggested it was some kind of fused quartz and that the RI could be anywhere between that of feldspar and that of topaz - not a lot to go on. I raised the culet angle a little so that it wouldn't outright window if it were as low as feldspar. Going on the look of the finished gem, I'd say the RI is higher than feldspar. It's pinkish in incandescent/natural daylight, green in fluro and under LED it kind of loses most of it's colour, looking like very, very pale smoky quartz (but still very sparkly).</p><p></p><p>It polished very nicely, very quickly and very easily with cerium.</p></blockquote><p></p>
[QUOTE="Lefty, post: 414442, member: 2976"] Cheers mate. Yeah, it just came in the little packet with the name and nothing else so I had to go searching so I could at least work out things like critical angles, best polishing agent etc. The tiny bit of info I could find on it suggested it was some kind of fused quartz and that the RI could be anywhere between that of feldspar and that of topaz - not a lot to go on. I raised the culet angle a little so that it wouldn't outright window if it were as low as feldspar. Going on the look of the finished gem, I'd say the RI is higher than feldspar. It's pinkish in incandescent/natural daylight, green in fluro and under LED it kind of loses most of it's colour, looking like very, very pale smoky quartz (but still very sparkly). It polished very nicely, very quickly and very easily with cerium. [/QUOTE]
Verification
Post reply
Gemstones, Minerals & Fossils
Lapidary
Stones I have cut
Top