CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: Re: Off the dop - post YOUR latest creation
PostPosted: Tue Sep 10, 2019 6:09 am 
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Location: Walnut Creek, CA
Mex opal, 2.40 ct.
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 Post subject: Re: Off the dop - post YOUR latest creation
PostPosted: Tue Sep 10, 2019 11:43 am 
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Lovely cutting Marco! Mexican Fire Opal does that color best - like warm embers!

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 Post subject: Re: Off the dop - post YOUR latest creation
PostPosted: Tue Sep 10, 2019 3:42 pm 
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The color of these opals can be amazing. This one has some more yellow-ish reflections that I could not capture. Really a little ember (too bad it isn't burning that lint on the table...).
Too bad for their looow RI, any design with a table is bound to be optically disappointing, somehow. I'd like one day to find a nearly spherical nodule to cut a Markoh-i-noor with Mex opal... :D

Anyway, opals can display some amazing and different colors, isn't it? We have seen a few nice examples lately. :wink:


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 Post subject: Re: Off the dop - post YOUR latest creation
PostPosted: Sat Sep 14, 2019 2:09 pm 
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Summer has flown by and it feels like th4e only faceting I have done was a result of demonstrations at another local club show. As usual, these were finished after the show so I could add concave facets and experiment.

The first is a 9.81 cts. lemon citrine that is 12.4 mm. across.
Attachment:
File comment: lemon citrine
1678.JPG
1678.JPG [ 61.94 KiB | Viewed 276 times ]


Next is a 6.12 cts. prasiolite quartz 11.6 mm. round. For this one, the crown was shaped into a dome before a few flat facets were placed on it.
Attachment:
File comment: prasiolite
1633.JPG
1633.JPG [ 49 KiB | Viewed 276 times ]


And of course, I had to include hexagons. This lemon quartz gem is 12.2 mm. wide and weighs 7.16 cts.
Attachment:
File comment: hexagon citrine
1729.JPG
1729.JPG [ 54.11 KiB | Viewed 276 times ]


This is another citrine at the other end of the color range. It is 2.39 cts. and 8.6 mm. across.
Attachment:
1691.JPG
1691.JPG [ 52.45 KiB | Viewed 276 times ]

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