Skip to main content
BLACK FRIDAY SALE 15% OFF - Use Code:
BFRIDAY15
FREE 18K Gold Vermeil Angel Wing Necklace on $1000+ Orders
BLACK FRIDAY SALE 15% OFF
Use Code: BFRIDAY15
FREE Angel Wing Necklace on $1000+ Orders
800-201-3404
CONTACT US
SIGN IN
25KARATS |
800-201-3404
CONTACT US
SIGN IN
WISH LIST (
0
)
MY CART ( 0 )
25KARATS
|
1-800-201-3404
LIVE CHAT
CONTACT US
SIGN IN
WISH LIST (
0
)
MY CART ( 0 )
LIFETIME WARRANTY
FREE SHIPPING
&
60-DAY RETURNS
Toggle navigation
0
0
WEDDING BANDS
More ...
WEDDING BANDS
Wedding Band Sets
Diamond Wedding Bands
Handmade Rings
Celtic Rings
New Wedding Band Styles
Best Selling Wedding Ring Sets
Recently Purchased
Benchmark Rings
Plain / Classic Bands
Basic Designs Rings
Fancy Designs Rings
Religious Bands
Square Bands
Sport Themed Rings
Browse All Collections
ENGAGEMENT RINGS
More ...
ENGAGEMENT RINGS
Moissanite Preset Engagement Rings
Solitaire
Rings With Sidestones
Halo Rings
Three Stone Rings
Bridal Sets
Antique Rings
Pave Rings
Magnifique Collection
Yellow Diamond Rings
Pre-Set Rings
Promise Rings
Recently Purchased
WOMEN RINGS
Anniversary Rings
Diamond Wedding Rings
Eternity Wedding Bands
Fashion & Right Hand Rings
Gemstone Rings & Bands
MEN RINGS
More ...
MEN RINGS
Men Diamond Rings
Men Diamond Wedding Bands
Men Wedding Bands
Sports Themed Rings
Benchmark Rings
Ceramic Rings
Titanium Rings
Cobalt Chrome Rings
DIAMONDS
DIAMONDS
SEARCH FOR DIAMONDS
Natural, mined diamonds
SEARCH FOR LAB GROWN DIAMONDS
Lab created, cultured diamonds
JEWELRY
Diamond Bracelets
Diamond Stud Earrings
Halo Studs - Diamond/Sapphire
Yellow Diamond Earrings
Angel Wing Pendants
Gold Earrings/Pendants/Necklace
Sara Blaine Jewelry
Home
Education
Jewelry Glossary
Jewelry Glossary
Lookup definition:
Reset
CALCIUM CARBONATE:
The main mineral component of a pearl's nacre, or outer layer. It is composed mostly of calcite and aragonite.
