Plant it to grow Sorcerer Stone. There's mystical gem embedded in this rock. Heck, there's probably a few in there. Smash it open and see!
Sorcerer Stone Seed price in Growtopia: sells for about 1 WL (median of 23 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: NHAT1