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
Gemstones and Minerals
Lightning Ridge crystal nobby
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: 253341" data-attributes="member: 2976"><p>Cheers Wally, yeah it surprised the hell out of me.</p><p></p><p>I have a mate who is a jeweller and former opal miner, I'll ask his advice before doing anything with it. It seems to me that what we want here is the opposite of what we want in a faceted stone. With faceting, we want all light entering through the top to be totally reflected back off the bottom and out the top again, maximum sparkle. But here, I think we want all light that makes it all the way through to the bottom surface of the stone to be absorbed rather than returned so that only the colour layers in the stone return the light back out the top, so they don't have to compete with extra light coming back up off the bottom, which seems to dilute the colours.</p><p></p><p>But then, I've probably got that wrong <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> Hence, I'll ask first.</p></blockquote><p></p>
[QUOTE="Lefty, post: 253341, member: 2976"] Cheers Wally, yeah it surprised the hell out of me. I have a mate who is a jeweller and former opal miner, I'll ask his advice before doing anything with it. It seems to me that what we want here is the opposite of what we want in a faceted stone. With faceting, we want all light entering through the top to be totally reflected back off the bottom and out the top again, maximum sparkle. But here, I think we want all light that makes it all the way through to the bottom surface of the stone to be absorbed rather than returned so that only the colour layers in the stone return the light back out the top, so they don't have to compete with extra light coming back up off the bottom, which seems to dilute the colours. But then, I've probably got that wrong :) Hence, I'll ask first. [/QUOTE]
Verification
Post reply
Gemstones, Minerals & Fossils
Gemstones and Minerals
Lightning Ridge crystal nobby
Top