cultured and freshwater
last edited: 11/29/17 number of photos: 35
Pearls are gems, but not gemstones.
Pearl is Aragonite: CaCO3
black natural pearls: A B
pearl beads, natural colored: A B C D E F
pearl beads natural and dyed: A B C D E F
pearl beads, dyed: A B C D
cultured pearls: 1 2 3 4 5 6 7 8 9 10
culturing pearls in China: 1 2 3 4 5
pearls within an oyster: 1
pearls in jewelry
pearl rings: 1
Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.