OnePlus tested a marble OnePlus 7T, but you'll never be able to buy it

OnePlus tests several prototypes of the same smartphone before settling on the final design. This extensive process also involves testing different materials, and CEO has now revealed some discarded options from the past.

Pictured in the photos above and below are six OnePlus smartphones. Two of these units, the blue OnePlus 7T and matte whit OnePlus 5T Star Wars Edition, were made available to purchase either at launch or shortly after.

The remaining four prototypes unfortunately never made it to production. Included among these is a OnePlus 7T unit complete with a gorgeous marble ...