Collect beautiful gemstones by dragging them to their matching twin. Reach the goal number of collected gems in a given time. A very enjoyable, sometimes challenging game. Precious Pebbles features 45 levels with increasing difficulty, 15 different gemstones such as Malachite, Sugilite, Tiger-Eye, Orange Calcite, Turquoise and Opal. Several game mechanics are added when getting through the game. All these mixed together yields very entertaining gameplay.
Actual screenshot from the game. It is one of levels in opals set.