The hoard of jewelry was found in a ceramic jar. RIYADH, SAUDI ARABIA—A collection of more than 100 gold, silver, and gemstone jewelry pieces stored in a ceramic jar was discovered in Diriyah, a settlement that was once a stop on the route that connected Basra in southern Iraq and Mecca on the west coast of Saudi Arabia more than 1,000 years ago, according to a Live Science report. Pilgrimage to Mecca, a trip known as the hajj, is considered a r…