Aquamarine, along with emerald, is a gemstone variety of the silicate mineral beryl. Its name meaning "sea water," aquamarine ranges in color from a sea-green to a sky-blue and generally forms large, somewhat clear crystals. In ancient times, aquamarine jewelry was thought to protect sailors.

Kyanite takes its name from from the Greek word kyanos which means "deep blue." Formerly called disthene, kyanite is found primarily in shades of blues and greens. The shiny, translucent gemstone is known for its color zones and variation in hardness. Zodiac signs associated with kyanite are Aries, Taurus and Libra. The stone is said to have an effect on dreams and in improving memory and encouraging mental clarity.

Labradorite is a glowing silicate mineral which shows lovely blue and golden green iridescence. This iridescence is the result of thin layers in the stone, a phenomenon which happens during the cooling process. Jewelry quality labradorite comes from India, Finland, Madagascar and Russia.

Larimar is a rare gemstone found only in an inaccessible region of the Dominican Republic overlooking the Caribbean Sea. The sky blue stone's name was coined by a Dominican, Miguel Méndez, who combined his daughter's name Larissa, with mar, the Spanish word for sea.

Natural pearls are formed when an foreign object becomes trapped in the shell of an oyster or pearl and the animal surrounds the object with several mineral layers in order to protect its soft tissue. Most pearls sold today are farmed pearls, created by intentionally inserting small mother-of-pearl beads in the oyster's shell. The resulting pearls are harvested up to two years later. Pearls come in a range of pastel colors from cream to blue to pink, and irregularly shaped pearls are often called "baroque" pearls. Mabe pearls are hemispherical cultured pearls grown against the inside shell of an oyster rather than in the mollusk's body. Mabe pearls are typically used in settings such as that conceal their flat backs.