Turquoise Ring & Necklace

I have what I believe is a turquoise ring and necklace set. I know there are different colors of turquoise, but I am not sure id this the stone in these pieces or if it is something else. Both pieces are signed by the same artist, look like D. Jim. I know there are several Native American artisans with the last name Jim, but I have not found this one. Any help is greatly appreciated.

 

Appears to be the shape of OAHU
probably an older Hawaiian souvie.

I've not seen any like this (new) in the past 28 years.

 

Non Native & I don't recognize the stone as north american turquoise.

 

I have had jewelry set with variscite stones with similar veining and greenish color.

 

I've seen turquoise like that before but it does look more like variscite. Artisan stuff, looks like.

 

Thanks, I will start checking out information on variscite.

 

Look up Damele turquoise on nevadagem.com, it looks similar

 

I had a friend who retired from the phone co. and started making jewelry. His background was Seminole. He and his wife traveled to Arizona every year to buy chunks of turquoise. I really liked the green and have several pieces made with it. Here is a link to Damele Turquoise images. One think I learned from George is that fine jewelry generally has an opening behind the stone to provide air. The exception seems to be turquoise. His rings had a solid back like yours. I recommend you polish the tarnish off the silver and you may be able to read the name, plus the jewelry will be much more attractive.
http://search.comcast.net/?cat=imag...&start=80&num=20&safe=on&q=damele+turquoise/0

 

Elizabeth & Bev thanks for the links to the turquoise. Will have to clean up the pieces a little bit a see if I can get a better look at the signature.