Traditionally, scrying is a form of divination of gazing into a crystal ball under moonlight or candlelight. The reflections of the light drift your mind into a trance-like state. Whatever images arise from these reflections would be the answers you are seeking. Total Fortune Teller.
However, if you don’t have a crystal ball do not fret! Crystals are crystals :)
I recommend any crystals that are multi-faceted and that catch light easily:
Once you have chosen your crystal, create a dark place with only candlelight or moonlight (the Full moon is best) to practice scrying. This can be an inside or outside altar.
Reflect on what you wish to know or ask.
When you are ready, center yourself, connect with your guides/divine and gaze at your crystal.
As you breathe deeply, let your focus soften as you gaze. This will relax your face and blur your vision a little and that’s what you want!
Be aware of what thoughts, images, feeling arise as you gaze at your crystal.
Be open-minded and know whatever comes to you is what you need to know.
Trust the universe, the crystal you chose and of course, your intuition.