I tested the Green Discs that make up this necklace with a Hot needle and it did not melt and did not stick to material, I may be wrong but i this they Call this Lapis Stone, and it does look like a Man made green stone and some show a Grey color in the Middles like maybe this is Clay ???

'''PLEASE LOOK GOOD, ASK QUESTIONS IF NEEDED AS I AM EXACTLY UNSURE, BUT ITS NOT PLASTIC'''

The material is not smooth but a rough texture and each disc is 10mm in size