Great looking piece, think that description is a match. These are still made, although not as popular as the 70s which your piece is from. Before buyers where concerned with the actual artists it was whether it was authentic Indian Handmade. Lots of different attempts to authenticate pieces, like this NAVAJO stamp.
Check the silver content! Alot of these were made with Nickel Silver casings… Only the setting of the stones being Sterling. Bic Lighters were created in 1973. So you know it is at least that old! I own two one for the standard Bic and one for the micro Bic. I love them both!