Composite green stone with flecks of copper, stamped .925 ring!

The center stone is a gorgeous 20x15mm green, man made stone with little flecks of copper in the veins! This ring is stamped 925 (At least I think so? It tests as silver?) Looks to be handmade! Non-adjustable - size 7.5 💎gemstone, 14k, silver, gold, estate, ring, pendant, earrings, loose, natural, genuine, synthetic, lab, diamond, moissanite, vintage, real, gemstone jewelry, engagement, anniversary, promise, wedding, plated, gem, necklace, broach, fire, crystal, jewel, gift, authentic, collectable, affordable, tested, luxury, natural, opal, emerald, aquamarine, topaz, sapphire, tourmaline, zircon, spinel, investment, ruby, alexandrite, stamped 💎