Stones (also known as Jewels) are treasures that appear in Luigi's Mansion, Luigi's Mansion 2, and Luigi's Mansion 3: The Room of DOOM!. There are four different types of Stones: Red (1,000,000G each), Green (800,000G each), Blue (500,000G each), and Purple (100,000G each). The purple variety only appears in Luigi's Mansion 2 and Luigi's Mansion 3: The Room of DOOM!. In all games, ten of each variety are found in the mansion, adding up to 23,000,000G in the first game and 24,000,000G in the second and third games. Watering plants, examining objects, sucking up Speedy Spirits, and lighting up rooms are ways of earning Stones. The Red Stones are also known as Rubies. The Green Stones are also known as Emeralds. The Blue Stones are also known as Sapphires, and the Purple Stones are also known as Amethysts.