Magnesium Carbonate 100% pure chalk keeps hands dry for a secure grip. Cramer Block Chalk & Liquid Gym Chalk, Magnesium Carbonate for Better Grip in Gymnastics, Weightlifting, Power Lifting, Pole Fitness, Rock Climbing 4.5 out of 5 stars 29 $11.98 - $27.49 As a food additive magnesium carbonate is known as … Magnesium carbonate, most often referred to as "chalk", is also used as a drying agent on athletes' hands in rock climbing, gymnastics, and weight lifting. 1 lb. Don't rely on the community chalk bin at the gym. Wt. 2 ounce blocks × Reward Points. One pound box contains eight 2 oz. Find patient medical information for Magnesium Carbonate Block on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Keep your own stash at hand! blocks. 1 points will be … Gym Powerlifting Chalk by the Block ( Magnesium Carbonate ) A must have. Primo Chalk starts with our magnesium carbonate base. From there we add super fine Epsom salt, clove, eucalyptus, cinnamon, rosemary and lemon essential oils – … Sounds fancy but it’s actually just chalk.