DIAMONDS: known as the "stone of invincibility" (due to its hardness as a stone), diamonds are symbols of victory and the superior strength (physical, emotional, mental) of the wearer. Diamonds have also been referred to as the "king of gems", being the hardest known natural substance as well as its superior light reflective abilities.
KYANITE is one of two minerals on Earth that is said to not retain any negative energy (the other being citrine). While kyanite can come in many different colors, it is most known for its rich blue shades as in this necklace.
OXIDIZED SILVER: Silver is a metal extremely reactive to oxygen - that's why it tarnishes. Oxidized silver is simply sterling silver (92.5% pure silver - 7.5% copper to stop further tarnishing) that has been allowed to tarnish, giving it that dark gun-metal like look. The pros to this metal is that it is just as valuable as sterling silver; you simply don't ever have to polish it!