The Golden Goddess Gems are three powerful gems scattered across Skyrim. They are thought to each contain some of the ancient powers of the Golden Goddesses. The Golden Goddess Gem trio consists of Din's Ruby, Farore's Emerald, and Nayru's Sapphire. Each of the gems weigh 0.1 units and have a value of 750. The Golden Goddess Gems can be used to awaken the Master Sword or craft their respective spells (Din's Fire, Farore's Wind, and Nayru's Love).
Nayru's Sapphire is the timeless wisdom of Nayru crystallized into a deep blue sapphire. It is used to awaken the Master Sword or create Nayru's Love.
It is located in Shroud Hearth Barrow in Iverstead, in a corner of the room before the word wall. Reaching the Sapphire requires Whirlwind Sprint, the Roc's Cape, or the Hover Boots. Look for a strongbox with a blue light around it.