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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7 Tivoli 8305 China Soup Salad Bowls With Pink Flowers  Blue Sea Shells 3000
7 Tivoli 8305 China Soup Salad Bowls With Pink Flowers Blue Sea Shells 3000
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THREE STUNNING Preowned Lenox Ivory Seashell Dishes 24 Kt Gold Trim 7 Diameter
THREE STUNNING Preowned Lenox Ivory Seashell Dishes 24 Kt Gold Trim 7 Diameter
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4 Fitz  Floyd 1976 COQUILLE Peach Seashells Bread  Butter Dessert Plate
4 Fitz Floyd 1976 COQUILLE Peach Seashells Bread Butter Dessert Plate
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Garden Ridge set of eight seashell dishes bowls teal blue and white
Garden Ridge set of eight seashell dishes bowls teal blue and white
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Thomson Pottery SEASHELLS Soup Cereal Bowl 5761936
Thomson Pottery SEASHELLS Soup Cereal Bowl 5761936
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Pfaltzgraff Seashell Soap Dish Hunter Green Ceramic Stoneware Embossed USA 80s
Pfaltzgraff Seashell Soap Dish Hunter Green Ceramic Stoneware Embossed USA 80s
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Mikasa Bar Harbor Pattern Blue Scallop SeaShell Coffee Mug Cup Portugal
Mikasa Bar Harbor Pattern Blue Scallop SeaShell Coffee Mug Cup Portugal
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Beautiful Vintage porcelain Limoges double Sea Shell shaped dish T
Beautiful Vintage porcelain Limoges double Sea Shell shaped dish T
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Pfaltzgraff USA Seashell bowl stoneware ivory off white 10
Pfaltzgraff USA Seashell bowl stoneware ivory off white 10
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Seashell Dish Portugal Pottery stoneware
Seashell Dish Portugal Pottery stoneware
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Plate Decorative Seashells in Center Ivory w Gold Trim Made in Italy 7 Rd 14G
Plate Decorative Seashells in Center Ivory w Gold Trim Made in Italy 7 Rd 14G
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Lefton Sea Shell Conche Bowl Made in Japan 5764
Lefton Sea Shell Conche Bowl Made in Japan 5764
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24 Karat B2001 Ivory bone china White Gold trimmed 3 Sectional Sea Shell dish
24 Karat B2001 Ivory bone china White Gold trimmed 3 Sectional Sea Shell dish
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19th Century Antique Staffordshire Transferware Waste Bowl Seashells
19th Century Antique Staffordshire Transferware Waste Bowl Seashells
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Vintage Large Soup Chowder Tureen Coastal Beach Sea Shell 375 qt HiMark Japan
Vintage Large Soup Chowder Tureen Coastal Beach Sea Shell 375 qt HiMark Japan
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VINTAGE SEA SHELL HAND PAINTED TEA CUP SAUCER LOT MCM
VINTAGE SEA SHELL HAND PAINTED TEA CUP SAUCER LOT MCM
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Fitz And Floyd Coffee Cup Tea Cup Sea Shells White Brown Tan 10 Ounce
Fitz And Floyd Coffee Cup Tea Cup Sea Shells White Brown Tan 10 Ounce
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San Raphael by Bordallo Pinheiro Seashell Blue Salad Plates Set of 4 New
San Raphael by Bordallo Pinheiro Seashell Blue Salad Plates Set of 4 New
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medium vtg hull e15 and e16 conch sea shells
medium vtg hull e15 and e16 conch sea shells
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Fitz  Floyd Monotone Shell Peach 10 1 4 Dinner Plate Seashell Scallop Shell
Fitz Floyd Monotone Shell Peach 10 1 4 Dinner Plate Seashell Scallop Shell
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Lenox Agean Sea Shell Candy Soap Dish
Lenox Agean Sea Shell Candy Soap Dish
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Fitz  Floyd Monotone Shell Peach 7 1 2 Salad Plate Seashell Scallop Shell
Fitz Floyd Monotone Shell Peach 7 1 2 Salad Plate Seashell Scallop Shell
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Fitz  Floyd Monotone Shell Peach 6 3 4 Bread and Butter Plate Seashell Scallop
Fitz Floyd Monotone Shell Peach 6 3 4 Bread and Butter Plate Seashell Scallop
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Vintage USA Gonder Imperial Line Art Pottery Seashell Vase Planter
Vintage USA Gonder Imperial Line Art Pottery Seashell Vase Planter
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HOMESTUDIO SHORELINE COLLECTION TREAT TRAY 16 AQUA TAN  CREAM SEA SHELLS
HOMESTUDIO SHORELINE COLLECTION TREAT TRAY 16 AQUA TAN CREAM SEA SHELLS
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WHITE GLAZED CERAMIC SEA SHELL SHAPED PLANTER 55 TALL
WHITE GLAZED CERAMIC SEA SHELL SHAPED PLANTER 55 TALL
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pfaltzgraff cranberry seashell soap dish usa
pfaltzgraff cranberry seashell soap dish usa
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Vintage studio pottery PAIR of gray stoneware Seashell mugs 3 inches
Vintage studio pottery PAIR of gray stoneware Seashell mugs 3 inches
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Belleek Seashell Shaped 325 Basket
Belleek Seashell Shaped 325 Basket
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Edgecomb Potters Pottery Maine Blue Red Seashell Dish Bowl 105 Wide
Edgecomb Potters Pottery Maine Blue Red Seashell Dish Bowl 105 Wide
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Ceramic Dish White w Sea Shells 10 D Italy
Ceramic Dish White w Sea Shells 10 D Italy
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RARE Antique AL Limoges Depose Plate Hand Painted Seashells Gold Gilded 925
RARE Antique AL Limoges Depose Plate Hand Painted Seashells Gold Gilded 925
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Vintage Retro 50s 60s Sea Shell Pottery Chip  Dip Serving Dish Drip Glaze McM
Vintage Retro 50s 60s Sea Shell Pottery Chip Dip Serving Dish Drip Glaze McM
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SONOMA LIFE STYLE SEASIDE TAN MUG 16 OZ CREAM  TAN EMBOSSED SEA SHELLS
SONOMA LIFE STYLE SEASIDE TAN MUG 16 OZ CREAM TAN EMBOSSED SEA SHELLS
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LENOX China Aegean Seashell Appetizer Bowl Chip  Dip Serving with Gold Trim
LENOX China Aegean Seashell Appetizer Bowl Chip Dip Serving with Gold Trim
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NAPCO JAPAN CONCH SEASHELL MCM wall Pocket VASE SUCCULENT AIRPLANT
NAPCO JAPAN CONCH SEASHELL MCM wall Pocket VASE SUCCULENT AIRPLANT
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SONOMA LIFE STYLE SEASIDE AQUA MUG 16 OZ CREAM  BLUE EMBOSSED SEA SHELLS
SONOMA LIFE STYLE SEASIDE AQUA MUG 16 OZ CREAM BLUE EMBOSSED SEA SHELLS
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Two Mikasa SOUTH HAMPTON BEIGE 12 Charger Chop Plates Seashell Pattern
Two Mikasa SOUTH HAMPTON BEIGE 12 Charger Chop Plates Seashell Pattern
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VTG POTTERY SEASHELL PLANTER USA 665 McCOY PINK BLUE CREAM COLLECTIBLE
VTG POTTERY SEASHELL PLANTER USA 665 McCOY PINK BLUE CREAM COLLECTIBLE
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IRISH BELLEEK Neptune Sea Shell Flower Pot 3rd Black Mark
IRISH BELLEEK Neptune Sea Shell Flower Pot 3rd Black Mark
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