They say the ancient kings of Hawaii would send servants out to graze the beaches at dawn looking for a special shell. They were given the name "Sunrise Shell" because the best time to find them was in the early morning, when the sun's light would reflect off the shell's beautiful vibrant hues, making them easier to spot.
Pecten Langfordi (Langford's Pecten) or better known by its common name "Sunrise Shell" is a hard to find deep water scallop, native only to the Hawaiian Islands. Sunrise Shells are highly prized for both collecting and jewelry.
Because of their rarity, Sunrise Shells can be extremely expensive. Even an imperfect, tide worn specimen can sell for well over $100. And if that tide worn specimen happens to be an unusual color, it can sell for even more.
I found a great article on TheHonoluluAdvertiser.com from 2003 about the Sunrise Shell craze. It discusses pricing of these tiny treasures. Direct link to the article: http://the.honoluluadvertiser.com/article/2003/Jan/19/ln/ln07a.html