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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Ceramic Pitcher Made in Italy Blue Seashell Starfish pattern
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Salt and Pepper Sangostone Coquille Ceramic Pink Seashell Design 4 tall EUC
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Creamer Open 5 x 3 1 4 Sangostone Coquille Ceramic Pink Seashell Design
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6 Tivoli 8305 China Dessert Salad Plates With Pink Flowers  Blue Sea Shells
6 Tivoli 8305 China Dessert Salad Plates With Pink Flowers Blue Sea Shells
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Antique Porcelain Tea Cup  Saucer Green  White Delicate Embossed Sea Shells
Antique Porcelain Tea Cup Saucer Green White Delicate Embossed Sea Shells
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Royal Winton Grimwades Seashells Made in England
Royal Winton Grimwades Seashells Made in England
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Vintage Fitz  Floyd White Peach 8 Shell Bowl Seashell Candy or Soap Dish
Vintage Fitz Floyd White Peach 8 Shell Bowl Seashell Candy or Soap Dish
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Antique Majolica Abalone Sea Shell Center Bowl
Antique Majolica Abalone Sea Shell Center Bowl
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3 Fitz and Floyd Seashell Variations Mugs Cocoa Brown Interior 1979
3 Fitz and Floyd Seashell Variations Mugs Cocoa Brown Interior 1979
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Zaccagnini Italian Art Pottery Seashell Conch Shell RARE Italy Terracotta
Zaccagnini Italian Art Pottery Seashell Conch Shell RARE Italy Terracotta
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3 Saucers Only Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
3 Saucers Only Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
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1 Dinner Plate A Crack Mottahedeh England Torquay Blue Gold Sea Shells 63876
1 Dinner Plate A Crack Mottahedeh England Torquay Blue Gold Sea Shells 63876
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2 Saucers Only Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
2 Saucers Only Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
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1 Salad Dessert Plate Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
1 Salad Dessert Plate Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
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1 Saucer Only Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
1 Saucer Only Mottahedeh England Torquay Blue Gold Trim Sea Shells 63876
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Homer Laughlin SEA SHELL DESIGN Seville Salt  Pepper Shakers Unmarked
Homer Laughlin SEA SHELL DESIGN Seville Salt Pepper Shakers Unmarked
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2 Cindy Crawford Embossed Sea Shell Beach Oceanview Dinner Side Plate Dish
2 Cindy Crawford Embossed Sea Shell Beach Oceanview Dinner Side Plate Dish
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RDE IMPORTS INC COLORFUL SEA SHELL DESIGN SET OF 4 MADE IN ITALY 6 BY 425
RDE IMPORTS INC COLORFUL SEA SHELL DESIGN SET OF 4 MADE IN ITALY 6 BY 425
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Vintage White w Gold Trim Lenox Japan Seashell Plate
Vintage White w Gold Trim Lenox Japan Seashell Plate
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Antique Vtg PALISSY MAJOLICA Lge CHARGER TRAY Barbotine Sea Shell Weed Christmas
Antique Vtg PALISSY MAJOLICA Lge CHARGER TRAY Barbotine Sea Shell Weed Christmas
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Vintage 1975 Set of 7 Fitz  Floyd Seashell Mugs
Vintage 1975 Set of 7 Fitz Floyd Seashell Mugs
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Vintage Seashell Blue Vase Clay Pottery Frankoma
Vintage Seashell Blue Vase Clay Pottery Frankoma
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Celebrating Home Stoneware NEW in Box Set of 2 Shoreline Seashell Bowls w Stand
Celebrating Home Stoneware NEW in Box Set of 2 Shoreline Seashell Bowls w Stand
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Mikasa SOUTH HAMPTON Seashells  Scrolls GRAVY BOAT  UNDERPLATE Excellent
Mikasa SOUTH HAMPTON Seashells Scrolls GRAVY BOAT UNDERPLATE Excellent
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MOTTAHEDEH VISTA ALEGRE PORCELAIN SEA SHELL DISH CATCH ALL
MOTTAHEDEH VISTA ALEGRE PORCELAIN SEA SHELL DISH CATCH ALL
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Stangl Granada Gold 4037 Hand painted Seashell Dishes Lot of 3
Stangl Granada Gold 4037 Hand painted Seashell Dishes Lot of 3
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Haviland Limoges Relish Dish Vintage Burgundy Gold Trim Seashell
Haviland Limoges Relish Dish Vintage Burgundy Gold Trim Seashell
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NORITAKE SEA  SKY B137 SEA GEMS 7 7 8 ROUND VEGETABLE BOWL SEASHELLS
NORITAKE SEA SKY B137 SEA GEMS 7 7 8 ROUND VEGETABLE BOWL SEASHELLS
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HOMESTUDIO SHORELINE COLLECTION SALT  PEPPER SHAKERS FIGURINE SEA SHELLS IN BOX
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3 PC SEASHELL CONDIMENT JAR SET SEASIDE BEACH TABLETOP KITCHEN TABLE HOME DECOR
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MIKASA OCEAN COLLAGE 2 CUPS  1 SAUCER DX102 CHERRIES SEA SHELL FISH PLAZA
MIKASA OCEAN COLLAGE 2 CUPS 1 SAUCER DX102 CHERRIES SEA SHELL FISH PLAZA
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ROYAL WORCESTER 875 SEA SHELL SHAPED DISH 2 OFFSET FLORAL SPRAYS FLOWERS GOLD
ROYAL WORCESTER 875 SEA SHELL SHAPED DISH 2 OFFSET FLORAL SPRAYS FLOWERS GOLD
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HOME COASTAL SQUARE DINNER PLATE 11 1 4 CREAM SEA SHELLS STARFISH
HOME COASTAL SQUARE DINNER PLATE 11 1 4 CREAM SEA SHELLS STARFISH
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HOME COASTAL RUFFLED CEREAL BOWL 7 1 4 CREAM SEA SHELLS STARFISH
HOME COASTAL RUFFLED CEREAL BOWL 7 1 4 CREAM SEA SHELLS STARFISH
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SEASHELL VASE RIBBED DRIP HAND TURNED BROWN BLUE 10 VINTAGE STONEWARE MARKED
SEASHELL VASE RIBBED DRIP HAND TURNED BROWN BLUE 10 VINTAGE STONEWARE MARKED
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Antique Haeger USA 3084 Pottery Sea Shell Green Color Excellent Condition
Antique Haeger USA 3084 Pottery Sea Shell Green Color Excellent Condition
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Fitz  Floyd Classics Oceana Pitcher Creamer Gravy Boat Seashells and Coral
Fitz Floyd Classics Oceana Pitcher Creamer Gravy Boat Seashells and Coral
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Large Vintage Majolica Pottery Vase Seashell Mark
Large Vintage Majolica Pottery Vase Seashell Mark
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Mikael Carstanjen Cape Cod Seashell Stoneware Pottery Tray Coastal
Mikael Carstanjen Cape Cod Seashell Stoneware Pottery Tray Coastal
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3 Otagiri Japan Vtg Seashore Coffee Mugs Cream 12oz Beach Coastal Home Seashells
3 Otagiri Japan Vtg Seashore Coffee Mugs Cream 12oz Beach Coastal Home Seashells
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