6 24 carat teal blue montana sapphire heated 17 500 00.
Sky blue montana sapphire.
Montana the treasure state produces nearly all of the sapphire in the united states.
Natural unheated montana sapphire.
If you don t know about the history of montana sapphires please have a look at our education page here.
If you re looking for something truly made in the usa look no further than these exciting and rare colors that only mother nature can provide.
This sapphire has been subject to traditional heat treatment in montana to improve the color and clarity but no other treatments have been applied.
This sapphire has good clarity with just a few tiny rutile needles only visible with a 10x loupe and a pair of small feather inclusions just barely.
The treatment is permanent and stable.
Light sky blue weight.
6 08 carat deep blue green montana sapphire heated 12 000 00.
This beautiful heated montana sapphire is a gorgeous sky blue bringing to mind the big skies of montana.
This gorgeous montana sapphire is a lovely light sky blue color reminiscent of the big skies of montana.
State of montana for more than a century and a half.
The color was developed by heating the gem in montana but no other treatments were made to the gem.
The treatment is permanent and stable and not only develops the color but also improves the clarity.
Historically gem quality sapphires have been mined commercially in four main areas in southwestern montana shown in figure 1.
The sapphire has excellent clarity.
A nearby source and an assurance of ethical mining practices make montana sapphires and yogo sapphires popular with american consumers.
Completely natural and untreated this is the color of the gem just as it formed deep in the earth millions of years ago.
Montana sapphire ranks nine on the mohs scale of hardness.
Montana sapphire undergoes heat treatment to create or improve color.
Small stripe like inclusions making this.
Sapphire has been mined in the western u s.
Montana sapphire ranges in color from blue blue green teal and green.
There may be.
7 33 mm by 5 18 mm depth 3 58 mm treatment.
The upper missouri river gravel bars 1865 dry cottonwood creek 1889 rock creek 1892 and yogo gulch 1895.
Unheated very rare stone clarity.
Montana sapphire occurs in the rock creek district of montana.
With rich cornflower blue yogo sapphires and fancy colored gems in any color of the rainbow these stones are a great choice for any jewelry project.
3 14 carat peacock blue montana sapphire 9 300 00.
3 52 carat robin s egg blue montana sapphire 10 600 00.
Montana sapphires have a long and exciting history.
Mined and cut in the united states this sapphire is an american treasure.
Home loose gemstones sapphire montana sapphire 0 92 carat light sky blue montana sapphire heated loose gemstones sapphire montana sapphire 0 92 carat light sky blue montana sapphire heated.