Buy 7.5" or 8" Heavy 47gram Sterling Silver Large Blue Chalcedony Cabochon Gemstone... here. For more info or to see another item in this category, click next item. To return to where you were before, use the current page links below. Shop Online at AllegroJewelry for a Pendant, Ring, Bracelet, Necklace or Body jewelry. Buy Cabochons, Diamonds, Gemstones, Watches, Wedding Bands, Solitaires, Amethyst, Jade, Money clips, Jewelry boxes and other jewelry at discount prices. Thank you for shopping at allegrojewelry online shopping!