Post subject: Terminated schrol crystal in aquamarine
Posted: Wed Dec 16, 2009 12:29 pm
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Joined: Tue Jun 03, 2008 4:40 pm Posts: 2667 Location: South Dakota
Just found this in the latest parcel..love finding cool little things like this..fully formed with a trignol term. schrol crystal in a light light aqua crystal
_________________ MrAmethystguy ~ Some jokes just fluorite over my head!
Joined: Tue Jun 03, 2008 4:40 pm Posts: 2667 Location: South Dakota
oh yea..you see the blue in that second pic down..the dividing line between the schrol and the aqua has an iridescent coating with blues, yellows, and greens..in some kind of wavy line type pattern..
_________________ MrAmethystguy ~ Some jokes just fluorite over my head!
Joined: Tue Jun 03, 2008 4:40 pm Posts: 2667 Location: South Dakota
Here are a few more pics i just took..at first i thought the colors were conchoidal fractures reflecting the light such as but after closer examination during my first post it seems to be like i said some sort of iridescent coating..reminds me, of course, of the iridescent hematite we collect at graves
The top of the schrol tourmaline termination as viewed down the termination(top) of the aqua crystals
_________________ MrAmethystguy ~ Some jokes just fluorite over my head!
Joined: Tue Jun 03, 2008 4:40 pm Posts: 2667 Location: South Dakota
..yes, maialetto you might be right!!!....I think it might be the distortion of light between the two mediums and the air pocket between them..sort of like oil on water...similar to what happens in "iris" quartz..per my buddy scotts thoughts..maybe maybe not..or could be the grease from that pizza i was eating ran down in there...It's not delivery..it's Digornio
_________________ MrAmethystguy ~ Some jokes just fluorite over my head!
Joined: Fri Oct 19, 2007 5:04 pm Posts: 1642 Location: Walnut Creek, CA
I use the interference effect to check my cut stones' table flatness and edge rounding. I've one of those common box for gems with a glass lid and when I put the gem into it I can see the interference fringes (any gem box should work more or less well). The more fringes I see the more rounded is the facet (assuming a flat glass lid...). If I can see many thin fringes at the table's edges it's because I've rounded edges. It's rough, it's veeeery qualitative, but it works well. Who does need interferometry/interference microscopy anymore?
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