Sea Shell

How can I tell how old a sea shell is?

Found a GIANT shell on vaca. How can I tell how old it is or where can i go for someone to tell me how old it is. Thanks in advance.

The average mollusk expands (enlarging it as it grows) its shell every 3 to six months. so if , say a clam is a seedling it will take about one year to grow to about one and a half inches in length. then about half inch every 6 months. If it is a snail , depending on what type , it too grows an average of one to two inches a year. I have a queen conch that measures 9 inches so this particular conch or snail is about 9 to 10 years old.
Some mollusk grow at a slower pace, like scallops it is said that they take 7 years to reach maturity and be able to reproduce. These sizes are about 3 to 4 inches wide or the span of 4 fingers.

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Antique Hutschenreuther Selb Bavaria Handpainted Porcelain Bowl With SeaShells
Antique Hutschenreuther Selb Bavaria Handpainted Porcelain Bowl With SeaShells
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Vintage BLUE RIDGE China SEASIDE Seashell Covered Jewelry Trinket Box
Vintage BLUE RIDGE China SEASIDE Seashell Covered Jewelry Trinket Box
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WEDGWOOD OCEANSIDE Ivory Seashells Bone China Gravy Boat with Platter Plate
WEDGWOOD OCEANSIDE Ivory Seashells Bone China Gravy Boat with Platter Plate
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WEDGWOOD OCEANSIDE Ivory Seashells Bone China Coffee Cup Mug
WEDGWOOD OCEANSIDE Ivory Seashells Bone China Coffee Cup Mug
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Vintage 1950s Pink  White Porcelain Hand Holding Seashell Vase w Roses SHP
Vintage 1950s Pink White Porcelain Hand Holding Seashell Vase w Roses SHP
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Fitz  Floyd Coastal Seashell Salt  Pepper Shakers
Fitz Floyd Coastal Seashell Salt Pepper Shakers
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1940s Rare  Gorgeous UCAGO JAPAN Hand Painted Hand Vase Holding a Sea Shell
1940s Rare Gorgeous UCAGO JAPAN Hand Painted Hand Vase Holding a Sea Shell
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South African Raku Pottery Signed Art Collectible Seashell Figurine 5 5 8 Long
South African Raku Pottery Signed Art Collectible Seashell Figurine 5 5 8 Long
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The ROYAL Porcelain Works WORCESTER Plate Seashell with gold rim 8
The ROYAL Porcelain Works WORCESTER Plate Seashell with gold rim 8
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Pier 1 Salad Dessert Plate Sea Creatures Shrimp Crab Seashell Blue Yellow Green
Pier 1 Salad Dessert Plate Sea Creatures Shrimp Crab Seashell Blue Yellow Green
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RARE Italy Seashell Art Pottery Ceramic Candy Soap Dish Bowl Pink
RARE Italy Seashell Art Pottery Ceramic Candy Soap Dish Bowl Pink
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Pfaltzgraff Set of 4 Ocean Breeze Seashell Napkin Rings Blue Green White
Pfaltzgraff Set of 4 Ocean Breeze Seashell Napkin Rings Blue Green White
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Studio Nova Nautical Sea Shell clear glass Serving Bowl 105 New in Box Vintage
Studio Nova Nautical Sea Shell clear glass Serving Bowl 105 New in Box Vintage
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Tivoli 830 Royal Majestic 12 Serving Platter Pink Roses and Blue Sea Shells
Tivoli 830 Royal Majestic 12 Serving Platter Pink Roses and Blue Sea Shells
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222 Fifth LIFES A BEACH Set of 4 Appetizer Dessert Bowl Coral Sea Shells
222 Fifth LIFES A BEACH Set of 4 Appetizer Dessert Bowl Coral Sea Shells
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Bella Seashell Set of 5 Salad Plates Shell Seahorse Starfish 8 5 8 GW52416
Bella Seashell Set of 5 Salad Plates Shell Seahorse Starfish 8 5 8 GW52416
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Vtg Georges Briard Creamer Secrets of the Sea Seashells Gold Trim
Vtg Georges Briard Creamer Secrets of the Sea Seashells Gold Trim
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Aluminia flowerpot holder in earthenware brown with fish and seashell motif
Aluminia flowerpot holder in earthenware brown with fish and seashell motif
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4 Fitz  Floyd Coquille Sea Shell 3 3 4 Porcelain Mugs Beach Ocean Nautical
4 Fitz Floyd Coquille Sea Shell 3 3 4 Porcelain Mugs Beach Ocean Nautical
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Vintage Otagiri bowl singular seashell motif hand painted glazed ceramic Japan
Vintage Otagiri bowl singular seashell motif hand painted glazed ceramic Japan
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Vtg Georges Briard Sugar Bowl and Lid Secrets of the Sea Seashells Gold Trim
Vtg Georges Briard Sugar Bowl and Lid Secrets of the Sea Seashells Gold Trim
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Hutschenreuther white bisque dish 6 wide mid century sea shell design
Hutschenreuther white bisque dish 6 wide mid century sea shell design
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Vtg Georges Briard Flat Cup In Secrets of the Sea Seashells Gold Trim
Vtg Georges Briard Flat Cup In Secrets of the Sea Seashells Gold Trim
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Sango China Tivoli 8305 9 DINNER Plates Seashells  Flowers W Storage Case
Sango China Tivoli 8305 9 DINNER Plates Seashells Flowers W Storage Case
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Sango China Tivoli 8305 8 Soup Salad Bowls Seashells  Flowers W Case
Sango China Tivoli 8305 8 Soup Salad Bowls Seashells Flowers W Case
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Sango China Tivoli 8305 9 Saucer Plates Seashells  Flowers W Storage Case
Sango China Tivoli 8305 9 Saucer Plates Seashells Flowers W Storage Case
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Shafford Original Double Seashell Dinnerware Serving Plate Tray
Shafford Original Double Seashell Dinnerware Serving Plate Tray
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6 Hand Painted Limoges Seashell Plates 8  inches
6 Hand Painted Limoges Seashell Plates 8 inches
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MANCHESTER GENUINE PORCELAIN SEASHELL SHELL DISH W BUTTERFLY DESIGN CHINA
MANCHESTER GENUINE PORCELAIN SEASHELL SHELL DISH W BUTTERFLY DESIGN CHINA
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COALPORT ENGLAND TIFFANY  CO SEASHELL SHELLS BOUILLON CUPS  SAUCERS SET OF 10
COALPORT ENGLAND TIFFANY CO SEASHELL SHELLS BOUILLON CUPS SAUCERS SET OF 10
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Midwinter Stonehenge SEASCAPE Lot of 2 Cup  Saucer Sets 4 pc Sea Shells
Midwinter Stonehenge SEASCAPE Lot of 2 Cup Saucer Sets 4 pc Sea Shells
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Wedgewood brand new large oval platter seashell design by Martha Stewart
Wedgewood brand new large oval platter seashell design by Martha Stewart
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Hand Painted SASSANO Italy Ceramic Conch Seashell Dish Planter Cos k3
Hand Painted SASSANO Italy Ceramic Conch Seashell Dish Planter Cos k3
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Charming Vtg Pink Capistrano Ceramics California Sea Shells Planter 85 x 4
Charming Vtg Pink Capistrano Ceramics California Sea Shells Planter 85 x 4
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Vintage Fitz and Floyd Coquille 1976 China Teapot Seashells Peach and WhiteConch
Vintage Fitz and Floyd Coquille 1976 China Teapot Seashells Peach and WhiteConch
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Vintage Set of 4 Sea Shell Plates Calif USA L70
Vintage Set of 4 Sea Shell Plates Calif USA L70
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Vintage Set of 4 Sea Shell Plates Calif USA L70 Gift Idea
Vintage Set of 4 Sea Shell Plates Calif USA L70 Gift Idea
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LAURA ZINDEL VASE SEAHORSE SEA SHELLS POTTERY 8 1 2 X 3 1 2
LAURA ZINDEL VASE SEAHORSE SEA SHELLS POTTERY 8 1 2 X 3 1 2
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2 Kate McRostie Certified International Seashell Serving Platters Multi Colored
2 Kate McRostie Certified International Seashell Serving Platters Multi Colored
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Vintage sea shell shaped clear glassplates desert bread made in France Lot 4
Vintage sea shell shaped clear glassplates desert bread made in France Lot 4
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