These earrings are made with a cute, rounded form, using only round bead beads. We've created these adorable earrings for everyday wear, using large natural stones familiar from power stone bracelets, after numerous prototypes. The metal balls are made of SV925. Materials: Hook: K10 yellow gold, Wire and metal ball: K14gf Natural Stones: Smoky Quartz, Mica Quartzite, Freshwater Pearl Size: Length: approx. 27.6mm, Width: approx. 12.0mm The K10 (10-karat gold) used contains more than 41.66% gold (Au). We use 10-karat gold for the chains, jump rings, and other earring, pendant, and bracelet findings. The findings other than the chain and jump rings are stamped with "K10". After use, wipe with a glasses cleaner and store in a zip-lock bag or something that blocks air to keep them beautiful for a long time. Notes: Please refrain from using abrasive cleaning cloths. There is no problem using it on the 10-karat gold findings, but as the wire uses K14gf (gold plating), the plating may peel off. Also, please be careful as many natural stones, such as turquoise and coral, are sensitive to abrasives.