Each orb is handcrafted by a Soul Jeweler, so each one will have unique shapes. The orb will hold a charge for some time after being left in the light for a few minutes. It gets more powerful if charged with real sunlight, but normal house lighting will allow it to charge as well. Keep in mind that since this is Spirit Energy, it gets weaker over time and, after the initial high glow period it will settle to a duller glow that can be seen for a long period of time but only in total darkness. This Listing includes a UV Blacklight Keyring which allows the user of the Pendant to charge the orb anywhere. Measurements: - Locket Diameter: aprox. 40 X 30 mm (aprox. 1.6" X 1.2") - Chain lenght: aprox. 30 cm (aprox 18") Materials: - Glowing orb - Bronze plated locket - Bronze plated chain