Post subject: Re: Off the dop - post YOUR latest creation
Posted: Sun Mar 17, 2019 8:25 pm
Valued Contributor
Joined: Tue Mar 27, 2012 10:15 am Posts: 352 Location: Cary, NC
animan,
Looks absolutely gorgeous. Put that in the win column and get ready for the next one. One more suggestion, take a cup of coffee and a notepad (or just mental musing), and thing about everything that went well and didn't. You have entered a hobby (and some of the members here are winning awards and making money), that you'll never regret.
Glad I could help, but all I did was tell you all the mistakes I *still* make and what to watch out for.
Congratulations once again and dop up the next one
_________________ Bob Hodges
Faceter: When turned into a zombie, they stumble around crying "roooouuuuggghhhh"
Post subject: Re: Off the dop - post YOUR latest creation
Posted: Fri Mar 22, 2019 4:24 am
Gemology Online Übergoddess
Joined: Mon Oct 06, 2008 6:13 pm Posts: 5077 Location: Australia
[quote="bobsiv"]I haven't had much time for cutting recently, but now that I'm furloughed I'm back at it! No sign of end to the shutdown so it's a good thing I have a lifetime supply of rough hoarded away. Here's a few, there are several more that I haven't photographed yet.
Post subject: Re: Off the dop - post YOUR latest creation
Posted: Tue Apr 16, 2019 3:03 am
Gemology Online Veteran
Joined: Sat May 22, 2010 2:51 am Posts: 755 Location: South Africa
Three Cornish cassiterites (tin oxide), 9.31 ct, 25.31 ct and 12.78 ct, for a private collector. There is a sulphide inclusion in the smallest stone, and most of the bright spots are pores.
Post subject: Re: Off the dop - post YOUR latest creation
Posted: Mon Apr 29, 2019 4:27 pm
Valued Contributor
Joined: Wed Feb 25, 2009 5:53 pm Posts: 175 Location: Toronto
Not quite a colored stone, but no other place to post it.
Stoichiometric Lithium tantalate in a barion cushion, with the c axis parallel to the table. This stuff is the king of pyroelectricity, generating up to 200 000 V from 40-50 degree celsius change in a 1 cm thick piece.
This material was from a piece meant to be used in a tabletop neutron/x-ray source, but was damaged and now sits in my rough container. It also has uses in nonlinear optics research and making acousto-optic modulators.
It's overcast so Ill have to wait to show you guys the ludicrous dispersion it also exhibits.
Attachments:
20190429_161729.jpg [ 608.09 KiB | Viewed 1590 times ]
Post subject: Re: Off the dop - post YOUR latest creation
Posted: Fri May 10, 2019 3:37 am
Gemology Online Veteran
Joined: Sat May 22, 2010 2:51 am Posts: 755 Location: South Africa
I've been cutting more softies - rhodochrosites recut from a small batch of broken stones I acquired over twenty years ago. Polishing was a bit of a struggle because of the numerous cleavage directions. Some facets still have a bloom of fine scratches because trying to polish them out only made them worse. The ‘pink’ stones are 0.65 ct; 0.68 ct; 1.46 ct; and 0.96 ct. The ‘red’ stones are 1.39 ct; 1.66 ct; and 1.71 ct.
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