Click the image to view this handmade om symbol necklace in my Etsy shop. I created the charm using Cinter Metal Clay and a drawing I made of the universal OM symbol. No two are exactly alike. I love making custom orders, and would be more than happy to make you an om necklace in different colors or materials.
Om is a mantra and mystical Sanskrit sound of Hindu origin. “OM” is the reflection of the absolute reality, it is said to be “Adi Anadi”, without beginning or the end and embracing all that exists. Om is sometimes spelled aum, which makes its three syllables more apparent. A-U-M. (excerpted from Wikipedia)
If you are interested, a more in depth definition of om specific to yoga can be found here. As the author states, the concept of OM is hard to distill into a sound bite. Summarizing it as “everything that is” or “past, present, future” is partially accurate, but also quite limiting. I think it is better to let the mystical stay mystical instead of nailing it down to one interpretation.