Top row, from left to right: an oval-cut tsavorite (green garnet) gemstone; a step-cut oval dark green emerald gemstone; an emerald-cut dark green emerald gemstone; a light green oval-cut hiddenite (green spodumene) gemstone.
Second row: a natural emerald crystal; a natural prismatic crystal of green tourmaline.
Third row: a water-worn prismatic crystal of green corundum (fancy sapphire); a rectangular step-cut green peridot gemstone; a natural prismatic crystal of chrome (dark green) diopside.
Bottom row: a dark green cushion-cut green (fancy) sapphire; a natural intergrown crystal of green fluorite; a rectangular step-cut green tourmaline gemstone; an oval-cut dark green zircon gemstone.