Plant it to grow Amphora. This ancient greek vase could be filled with just about anything! But my bet is on gems and possibly a seed.
Amphora Seed price in Growtopia: sells for about 2/WL (median of 15 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: HUZAI, HZOVX, TI84, KGUNX, DVFVV