Two main parts of the intervertebral discs are the outer ring (annulus fibrosus) and the inner gelatinous material. (nucleus pulposus). The outer ring consists of fibrocartilage, while the inner material shows many similarities to the articular hyaline cartilage both in its biochemical and histological appearance.
For this reason, Everything Wedding Rings recommends avoiding black tungsten wedding bands-with one exception. Titanium Kay has recently launched a new tungsten carbide wedding ring design with solid black inlay that is 100% scratch proof. So, if you are looking for a tungsten ring with black inlay features I highly recommend one of the Titanium Kay 2nd Generation rings.
TUNGSTENAIR. TungstenAIR is an innovative, patented metal that is as strong, hypoallergenic, durable and scratch resistant as Tungsten Carbide, but 1/3rd lighter. With a high strength-to-weight ratio, TungstenAIR is comfortable and easy to wear-made for the active lifestyle.