This is a rectangular marine jasper, decorated with silver beads of different sizes and round and flat, echoing its pattern, and the overall image is lively and joyous. Marine jasper production and Madagascar must wait for the appropriate cooperation of the tide before they can be mined by boat. The ball-shaped patterns are its characteristics, just like the bubbles of the ocean, they also have the image of joy. The main component is silicon dioxide with a hardness of 7. Material: 999 sterling silver / marine jasper 21 x 10 mm, partly vulcanized. Overall height: 4 cm Width: 1.3 cm (including the head) ***Necklace not included. Welcome to the silver chain area to buy. There are 18-inch 925 silver chains to choose from. ***Environmental protection requirements, gift bags are not provided (if necessary, please note in the order). The package includes jewelry box, silver cleaning cloth, thick zipper bag, and maintenance instructions. ***When not wearing it, please store it in a sealed bag. When it becomes black due to oxidation, wipe it with a silver cloth to restore the gloss.