Iron gives them blue
When the abalone shell is struck
Generally this material is used for transistors and heat sinks and only recently has been used for jewelry and healing
use it for anklets
There are 2 specimens pictured to show that there are variations in the size and color
Teal Kyanite 2x4mm Faceted Rondelle Nacklace - 15-16 Inch 48HR12062022 Iron gives them blueKyanite often occurs as long, bladed, striated crystals, transparent or translucent with a pearly luster. An aluminum silicate mineral, it may appear in white, pink, yellow, orange, green, blue, gray and black. In addition to its value as a gemstone, Kyanite is also extremely useful in industrial applications due to its high heat resistance. It is often used in kiln furniture and foundry molds, as well as for brake shoes, grinding wheels and cutting