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Author Topic: Opal doublet backing.  (Read 301 times)

tinker

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Opal doublet backing.
« on: July 29, 2021, 02:45:45 PM »
I hope this is the right section, I have a lot of crystal opal and was intending of making doublets out of the samples.  Can anybody tell me what I can use as the backing material, or where I can get material to make doublets.

Bucket

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Re: Opal doublet backing.
« Reply #1 on: July 29, 2021, 05:42:56 PM »
Some have used a type of black glass which can be purchased separately, it's thin and easy to use. I've successfully used black jasper, sliced as thin as I could, then ground away more if need after the opal is attached. For more accurate cutting I used a 6 inch very thin saw blade. I know some others have used other material, but I have good, very black jasper which does the job for me.
Common sense isn't exactly common

tinker

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Re: Opal doublet backing.
« Reply #2 on: July 30, 2021, 11:40:21 AM »
Thanks Bucket,   I've got a bit of almost black Jasper I will give that a try, what about black potch.

Rusted

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Re: Opal doublet backing.
« Reply #3 on: July 30, 2021, 11:42:10 AM »
Black Jasper is what I have used too. I have seen black Radiator putty used. Not my cup of tea but it did work. I think the stuff is sodium silicate so it sets hard.

Bucket

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Re: Opal doublet backing.
« Reply #4 on: July 31, 2021, 03:03:02 PM »
I think black potch would work well, they used to use that to be more 'genuine' 40 - 50 years ago.
Common sense isn't exactly common

steveo

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Re: Opal doublet backing.
« Reply #5 on: August 02, 2021, 04:19:37 AM »
Some use old vinyl records and probably smooth back after gluing.
Steve

MakkyBrown

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Re: Opal doublet backing.
« Reply #6 on: August 02, 2021, 08:13:51 AM »
I've heard of black obsidian being used. Might have picked that info up watching Outback Opal Hunters :)

MB
« Last Edit: August 02, 2021, 08:17:08 AM by MakkyBrown »

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