Alibaba offers 9,837 magnesium carbonate gym chalk products. about 83% of these are gymnastics, 12% are weight lifting, and 1% are carbonate. a wide variety of magnesium carbonate gym chalk options are available to you, such as Jan 01, 2015 · this item: magnesium carbonate gym chalk (case of 36 boxes) $365.90 only 8 left in stockorder soon. gibson athletic premium block gym chalk, 1lb, consists of (8) 2 oz blocks, magnesium carbonate $13.99 Hebei meishen technology co., ltd. is the professional manufacturer of magnesium oxide,magnesium hydroxide,magnesium carbonate,magnesium sulfate,gym chalk.tel:+86-319 Alibaba offers 242 mgco3 gym chalk products. about 56% of these are carbonate, 8% are gymnastics, and 1% are weight lifting. a wide variety of mgco3 gym chalk options are available to you, such as balance beam, magnesium carbonate, and uneven bars.