Large Hand Carved Gemstone Bear with Fish Black Obsidian Hand carved from Black Obsidian. Weight: 1.8 to 3 ounces on average / 50-85 grams Length: 2.25 inches on average / 5.72 centimeters Width: 1-1.5 inches on average / 3.3-3.81 centimeters Due to the nature of gemstones, carvings may slightly vary in size, color, and shape. The type of stone the fish is made of does vary.