Petersite forms in metamorphic settings leading to it's unusual color and shape patterns within the stone. Add a little shimmer and beauty to this steampunk-ish setting and you have a show-stopper! These necklaces are perfect for everyday wear or dressing up! These semi-precious stone necklaces are available in medium (approximately 1.25 inches long) and large (approximately 1.5 inches long) teardrops and come with a 18 inch chain.