One Mahogany Obsidian (Red Obsidian) tower, intuitively chosen.    Mahogany/Red Obsidian is great for boundary setting.  Each piece is about 1.4 oz and 2.75 inches tall: The pictures show an example of the height and weight of the tower and yours should be close to those numbers.
 
Please note that since each piece is handcarved and made of natural crystals, there may be very slight variation in color, size, shape, or texture.  Although we try our best to take accurate pictures of the product, there can also be slight variation depending on lighting, screen hue, etc.