Featured Beautiful Sterling, Opal, Coral, And Onyx pendant Signed.

I hope someone could help me Identify the maker of this pendant I bought.
I can't seem to locate these initials anywhere. I am reading L and B joined?
Measures 2 1/2" long including the bale.
Mikey

 

The only piece I have signed BL, which I posted quite a while ago is my sterling & turquoise Bolo tie Kachina, but Billy Lujan didn't sign the way your piece is signed either.....he signed both letters same size, but with the L slightly higher than the B...as shown below....I still have it........of course!!!!!! But, that's a LOVELY necklace you have there, Mikey!!!!

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Thanks @Aquitaine .
I've seen searching for days and haven't found a match. Maybe never will?
Mikey

 

I'm not sure what I should be looking for. Navajo, Zuni?
Is it Native American for sure?
@Any Jewelry are you available for some input or information?
Mikey

 

Here is the closest I could get. But I don’t think it’s him, because he does overlay and stone sets. Yours is inlay.

 

Thank you @cfh
It does look closer than any other so far.
Mikey

 

Also, it appears to me as more of spiny oyster than coral, but I could be wrong. It is a beautiful pendant!

 

I don't know whether it is Native American or not... There is one on this page that is close to yours, though not exact.
http://www.art-amerindien.com/hallmarks/l-indian-native-american-jewelry-marks.htm
It is down near the bottom, in the third line among the unidentified marks. At the beginning of that section it says "Your help will be very appreciated to name the following hallmarks: Unidentified marks may be fake marks or not Native American."
So that might not be much help, either, since it still could be anything.

And the mark could also be BL joined... instead of LB