CUPRIAN Tourmaline Gemstones
CUPRIAN Tourmaline Gemstones
This is a nice example of a cuprian tourmaline. The oval has a fine medium toned blue that shows off its faint purplish shade as it is moved in the light. The stone does suffer from an eye visible inclusion, down the middle of the stone. The inclusion is white and non reflective, but it is still very noticeably. Still it has a color, purplish blue, that is hard to find and should be appreciated. It weighs1.55 carats. 0579
Under the lop, you can see flaws in this interesting cuprian gemstone that must have been filled with a fluid that changed the surrounding volume of stone to purple from blue. There are also pink areas mixed in with the blue and purple,areas in this moderately included gemstone. The inclusions do effect the flash of this moderately toned stone that weighs 2.30 carats. 0592
This is an interesting and unique example of Laurellite. (A cuprian tourmaline with a reverse Alexandrite color change.) Only the violetish side of the stone changes color. One end of the bi color is relatively pure while the other end has many fine inclusions. It is still a pretty stone regardless of its cuprian nature. It weighs 1.16 carats. 0926
A historic and very rare gemstone. It reverse Alexandrite changes color, lavender to blue gray and contains copper. It weighs 5.37 carats and is a fine oval with a medium tone level. It is lightly included, which has little impact on its beauty. I was amazed the first time I saw the stone change color. 0945 tested
I love this gemstone in ways no one else can appreciate. When some tourmaline from Mozambique was found to have copper, as a chromophore, the prices of the material escalated quickly. Also the availability of quality material decreased rapidly, I went with the flow and kept buying colors that I liked, included or not. The rough for this beautiful round, to me, was a mess. But it was big enough that I could manage to get a very nice bright, relatively clean, Laurellite round out of it. I lost a lot of material, but the discovery that it was a Laurellite, reverse Alexandrite color changer, was certainly enough to placate me. I particularly like it's medium tone level and that the inclusions don't flash. It weighs 4.16 carats. 0999