Gem Party Favors Sonic the Hedgehog Chaos Emeralds Diamond Bag Crystal Gemstones( SET 3 ) (1 gem yellow) BRAND NEW! Multi-Color Gems (Choose quantity!) Made of plastic ***Approximately 1" inch (or 25mm / 2.5cm)*** Enjoy all colors (Set of 7) Play a color matching game ***Awesome for crafts **Great as party favors Kids absolutely love these! They come in 7 different colors. The shapes are as pictured. Click the drop-down menu above to CHOOSE QUANTITY and COLOR. Or if the options available don't suit your needs, just let me know. I'd be happy to help with your request. Big, colorful gems that will catch your eye and mesmerize you. Shiny and faceted-cut, in a variety of colors and shapes (exactly as pictured). Gems can be disconnected from the white base for crafts. I tried twisting one off. It appears it can be glued back on (if your child wants it reconnected). When twisted off, the gems have a small nub connected to them which inserts into the white, square base for stability (see pictures). The gems weigh 0.2 ounces (each). Blue and green are available in the multi-color set only (no longer available separately)