Joined: Sat Oct 10, 2009 1:23 pm Posts: 3 Location: Indio, California
Good afternoon
I like to know the way to introduce myself My name is Max Davis and I like to tell other about my new web site
http://1001raregemstones.com I have a section just for Scientific Equipment
with the latest Gem Refractometer FGR-003
And maybe trade some rare stone with other member of the group
Regards
Max
Joined: Tue Jun 03, 2008 4:40 pm Posts: 2667 Location: South Dakota
That is not to bad a site, Max..seems to have some decent info on there..please take the time to hang around and contribute some of your knowledge to the forum..back to your site to read some more
_________________ MrAmethystguy ~ Some jokes just fluorite over my head!
Post subject: The best refractometer one can find at an affordable price
Posted: Sat Oct 24, 2009 2:36 pm
New to the Forum or The Quiet Type
Joined: Sat Oct 10, 2009 1:23 pm Posts: 3 Location: Indio, California
To the question of Refractic index Liquid
The is a liquid call Monobromonatherline it is highly inflammable and hard to find. And can only be used by some one that has the right knowledge
Gem Refractometer FGR-003 Hard CZ measuring prism. Scale range: 1.35-1.85.Accuracy: ±0.003 Professional optical design. Aluminum alloy table. Internally installed the monochromatic light. There are two ways of inputting the voltage:7v batteries and DC3V direct current supply(AC100-240V).2ml refringent oil(1.78±0.005) with unique design of the bottle(Proprietary technology ZL200620096730.7),It is much safer ,much economical and more convenient
welcome to the gemology online forum, max!! looking forward to reading more of your posts on the forum. lol, i have a cat named, "max," he's quite a character!
wow!! i really enjoyed cruisin' around on your website!! nice to see a section for the little ones, too, so parents and grandparents can help them begin a gemstone collection. and...i saw the andradite garnet on your site--very nice!!
Joined: Thu Jul 30, 2009 9:00 am Posts: 545 Location: new york
Hi Max,
Welcome to the forum and congratulations on your great website.
I love your refractometer with CZ measuring prisme and extensive rare gemstones collection.
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
Lyric, did you buy this refractometer?
If so, what is the RI liquid supplied with it.?
In order to measure gems with an RI higher than 1.80 (plus or minus .01) the RI liquid has to be the same as the RI of the hemicylinder. In the past, the liquids that were available with appropriate RIs (2.15–2.18 for CZ) were far too toxic to be commercially allowable.
Joined: Tue Jun 12, 2007 6:41 pm Posts: 5534 Location: Massachusetts, USA
Well, I was looking at the state of the Art last night, and some of the fluids proposed for RIs higher than 1.9 are utterly insane...Arsenicals, etc., and suspect the only reason someone has not made a serious effort to do better is economic feasability. In short, is the market size large enogh to support an R&D effort? It appears not to be, or someone would have done it.
Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
I think that's the point I was trying to make.
There is NO reasonably safe fluid available with a refractive index high enough to make a CZ hemicylindar commercially viable.
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