Labradorite Pendant Necklace on Adjustable Rope

Natural labradorite pendant. Leaf or wave shaped. 1 3/4” tall and 1 1/4” wide. It’s 1/4” thick. It’s on a black adjustable nylon rope cord. Necklace can be as long as 25”. It has two woven sliders to increase or decrease the length. This pendant is pretty unique. It has stripes throughout and a noticeable natural line running diagonally through the middle. What makes this piece remarkable are the tiny rainbows that come out at certain angles and in the light. It has a sparkle to it and several rainbows. It does have a slight flash, but that is less noteworthy than the rainbows and sparkle it has.