Create a clipart collection of watercolor crystals, PNG crystals, gemstones and geodes. Use watercolor drawing techniques to add an artistic and organic touch to crystals and gemstones. Add subtle details to create a realistic and captivating effect. Use bright, contrasting colors to bring the crystals to life, bringing out the natural gradients and textures of the stones. The collection should include a variety of crystal shapes and sizes, halved geodes, gemstone slices, and amethysts. This cli