Hello Douglas and Sarah;
I haven't actually worked any ammolite yet but I did pick up a few
pieces at our Provincial Rock Club Federation's annual meeting back
in May. We also took a tour of the Korite Mine where ammolite is
dug out of the black shale near the St. Mary River in southern
The most common treatment is as you mention making a doublet if
there is suitable black shale on the back of your rough and bonding
a spinel or quartz cap on the front to protect the ammolite.
If there isn't enough black shale on the back triplets are made by
bonding again a quartz or spinel cap on the front and then a black
material on the back. I have even heard of using black jade on the
back of the triplet and tempered glass on the front.
The most common bonding agents I have heard of is opticon and clear
As well some of the members in our local club have been coating the
pretty side of the ammolite with opticon/epoxy then after it cures
cutting the ammolite to the shape they want and then mounting.
I can't say I'm a fan of this treatment; it just doesn't strike me
as very durable nor does it give the magnification effect of a
There are also a couple of sites on the internet with
Hope this helps,
in sunny and finally dry Calgary, Alberta