I've consulted with geologists and lapidary societies, and the consensus seems to be that it's a form of Larimar in its natural state. It's rare to find specimens like this with such unusual markings  and this makes it a very unique piece indeed. To show off these gorgeous natural markings, I framed it in an open woven copper frame that does not cover the stone at all.   

Comes with a 24" faux-copper chain.

 

I've attached a photo of Larimar in its rough form...and here's what Wikipedia says about Larimar (love the origin of the name!)

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The Dominican Republic's Ministry of Mining records show that Father Miguel Domingo Fuertes Loren of the Barahona Parish requested permission on 23 November 1916 to explore and exploit the mine of a certain blue rock that he had discovered. Pectolites were not yet known in the Dominican Republic, and the request was rejected.

 

Miguel Méndez and Peace Corps volunteer Norman Rilling rediscovered Larimar in 1974 on a beach at the foot of the Bahoruco Mountain Range, the coastal province of Barahona. Natives believed that the stone came from the sea, and they called the gem Blue Stone. Miguel took his young daughter's name Larissa and the Spanish word for sea (mar) and formed Larimar, to suggest the colors of the Caribbean Sea where it was found. The few stones that they found were alluvial sediment, washed into the sea by the Bahoruco River. An upstream search revealed the in situ outcrops in the range and soon the Los Chupaderos mine was formed.

Rare Larimar Specimen Large Oval

SKU: 18026
$120.00Price
  • Tallest & widest dimensions

    2 1/2" x 1 3/4"

  • About the silver

    I used pure copper wire, oxidized it to achieve a timeless "antiqued" look, polished it to bring out the copper highlights, and then sealed it to capture its patina and prevent further darkening. No further polishing will ever be needed. Protect from scratches and bumps against hard surfaces or other jewelry.