You are looking at a Lapis Lazuli Crocodile. The skull is 3.1 inches from left to right.

Solid, med. to dk. blue. In meditation, opens Brow Chakra: higher guidance, intuition, connection to higher self, overview, decisions for good of all. Organizes, quiets mind. Opens Throat/Thyroid Chakra: Self-expression, writing, creativity, dream insight, allows total awareness...Anxiety, restlessness, insomnia, autism, shyness, nervous system, depression, serenity, self-acceptance; MS, speech, hearing, pituitary, DNA, lymph, inflammation, pain (especially head), protection stone. Shelters the wearer like a shield. . Extraordinarily deep blue stone often flecked with Pyrite. Can also be mottled with white Calcite. Most is currently mined in the USSR and Afghanistan. Beneficial to the respiratory system, especially the throat and lungs, the cleansing organs, and the nervous system. A good stone for blood purification and for boosting the immune system. A powerful thought-amplifier and is helpful in aligning all the elements of the body and mind. Can increase psychic abilities and will open the third eye. Can guide you in teh direction of mental and spiritual purity. It should be worn as close to the throat as possible or at least above the diaphragm so that the energy of the wearer is drawn upward.