Colours and markings vary between crystals. This is for 1 Clear Quartz Seer Stone (aka Window Quartz / Ema Egg) which will be chosen for you.
About Clear Quartz Crystal Seer Stones (Window Quartz / Ema Eggs)
Clear Quartz is the most powerful crystal on the planet for both healing and amplifying energy. If you only have one crystal, this is the one to have. This crystal is a master healer, a motivator and provides clarity to your life.
Clear Quartz crystal will amplify the energies of all other crystals which is why Clear Quartz points are used in crystal grids and a Clear Quartz wand is used to activate a grid.
Use Clear Quartz points with other crystals to enhance their energy, positioning the point towards or away from you as required.
Clear Quartz crystals can be used for any condition and is apparently great for soothing burns.