Lemon Calcite Large Crystal ball 512g measuring 68mm. Newly found lemon calcite gives a lovely, happy feeling just holding the crystal. Science & Origin of Lemon Calcite Lemon Calcite is a new variety of Calcite. It is a calcium carbonate mineral that was recently discovered in Pakistan and its color can range in just about every shade of yellow and even a full bodied gold. The range of colors are due to the amount of iron impurities within each stone. At the time of this writing (June 2020) not Crystals, Calcite, Crystal Ball, Calcium, Plexus Products, Large Crystals, Calcium Carbonate, Crystal, Mineral