This is an image of the shadeshine as held by the last Satab ruler of the planet Ventooine.
The shadeshine was a unique gem that, upon physical contact, amplified an individual's sensory perceptions to an extraordinary level. This amplification transformed certain senses, such as sight and touch, into both receiving and transmitting capabilities. A person who came into contact with the stone gained abilities such as accelerating the metabolism of others, manipulating the temperature, and altering the density of the surrounding space. However, this power came at a deadly cost: the individual would inevitably perish within a year. Their senses would become so acutely sensitive to external stimuli that their body and mind would be overwhelmed. The person would eventually succumb to a painful death, essentially burning from the inside out.
The ruling family of Ventooine, known as the Satabs, possessed the only known shadeshine in existence throughout the galaxy. Annually, the Satab would select their heir, passing on the stone before entering a state of suspended animation. This tradition, along with the Satab's reign, was brought to an end by Han Solo. During his time as a smuggler and a visit to Ventooine, Han Solo killed the final Satab and destroyed the shadeshine by tossing it into the Millennium Falcon's engine exhaust.
The comic book elaborates on the Shadeshine's power, but does not explain the source of its abilities. The origin of its power remains a mystery, leaving it unclear whether it is a Force-sensitive artifact or whether its properties are simply a natural phenomenon—distinct from the Force—resulting from the interaction of this specific mineral with the physiology of Humans (and potentially other species).