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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MINT Opalescent Glossy Sea Shell Pitchers w Rubbler Seal Lids Just 7 Tall
MINT Opalescent Glossy Sea Shell Pitchers w Rubbler Seal Lids Just 7 Tall
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Vintage Fitz  Floyd Sea Shell 2 Plates Salad Dessert Bread n Butter Monotone
Vintage Fitz Floyd Sea Shell 2 Plates Salad Dessert Bread n Butter Monotone
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222Fifth Coastal Breeze Blue Seashell Seahorse 4 Salad Plates
222Fifth Coastal Breeze Blue Seashell Seahorse 4 Salad Plates
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222Fifth Coastal Life Gold New Seashell Seahorse Pitcher
222Fifth Coastal Life Gold New Seashell Seahorse Pitcher
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Fitz and Floyd Large 9 Coquille Peach Sea Shell Serving Bowl
Fitz and Floyd Large 9 Coquille Peach Sea Shell Serving Bowl
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VTG Irish Belleek Porcelain Sea Shell Nautical 5 Bon Bon Candy Nut Bowl Ireland
VTG Irish Belleek Porcelain Sea Shell Nautical 5 Bon Bon Candy Nut Bowl Ireland
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Vintage Royal Bayreuth Opalescent Spiky Conch Sea Shell Creamer
Vintage Royal Bayreuth Opalescent Spiky Conch Sea Shell Creamer
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Zrike Lisa Levy Baroque Seashell  Medallion Covered Bowl w lid Seashore
Zrike Lisa Levy Baroque Seashell Medallion Covered Bowl w lid Seashore
$12.00
Set of 3 Frankoma Seashells 473 Vintage Pottery Dishes Bowls
Set of 3 Frankoma Seashells 473 Vintage Pottery Dishes Bowls
$48.95
Lobster Pitcher Reef Ceramica Portugal Shell Fish Coastal Sea Life 6 5 8
Lobster Pitcher Reef Ceramica Portugal Shell Fish Coastal Sea Life 6 5 8
$44.99
Rare Style Eyes by Baum Bros SEASHELL COLLECTION Shell Plate 11 Plate 1
Rare Style Eyes by Baum Bros SEASHELL COLLECTION Shell Plate 11 Plate 1
$29.99
Style Eyes by Baum Bros SEASHELL COLLECTION Blue Crab 9 Plate
Style Eyes by Baum Bros SEASHELL COLLECTION Blue Crab 9 Plate
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Rare Style Eyes by Baum Bros SEASHELL COLLECTION Shell Plate 11 Plate 2
Rare Style Eyes by Baum Bros SEASHELL COLLECTION Shell Plate 11 Plate 2
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Rare Style Eyes by Baum Bros SEASHELL COLLECTION Shell Plate 13 Plate
Rare Style Eyes by Baum Bros SEASHELL COLLECTION Shell Plate 13 Plate
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Gorgeous Vintage Ornate Norcrest Sea Shell Pitcher Made in Japan Repaired
Gorgeous Vintage Ornate Norcrest Sea Shell Pitcher Made in Japan Repaired
$4.99
Antique English MINTONS Majolica Turquoise  Green Sea Shell Oyster Plate
Antique English MINTONS Majolica Turquoise Green Sea Shell Oyster Plate
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MAXCERA CORAL REEF GARLAND SEASHELL NAUTICAL SHORE SALAD PLATES SET OF 4 NEW
MAXCERA CORAL REEF GARLAND SEASHELL NAUTICAL SHORE SALAD PLATES SET OF 4 NEW
$44.99
Antique English MINTONS Majolica Pink Sea Shell Oyster Plate
Antique English MINTONS Majolica Pink Sea Shell Oyster Plate
$170.50
Stangl Art ware Pottery  Terra Rose Sea Shell Vase Planter  3672
Stangl Art ware Pottery Terra Rose Sea Shell Vase Planter 3672
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FITZ AND FLOYD OCEANA SEA SHELL COVERED DISH CONDIMENT DISH
FITZ AND FLOYD OCEANA SEA SHELL COVERED DISH CONDIMENT DISH
$46.74
Langenthal Suisse Small Bowl with Fish Shell  Sea Horse 625l X 4w X 15t
Langenthal Suisse Small Bowl with Fish Shell Sea Horse 625l X 4w X 15t
$10.00
Set of 7 SEA LIFE ART POTTERY SHOT GLASSES Fish Squid Shell Near Mint
Set of 7 SEA LIFE ART POTTERY SHOT GLASSES Fish Squid Shell Near Mint
$45.00
UNUSUAL PEWTER SEA SHELL SHAPED DISH 9 x 10
UNUSUAL PEWTER SEA SHELL SHAPED DISH 9 x 10
$16.99
Seashell Dish with Japan Stamp in glazed white finish 5 x 55
Seashell Dish with Japan Stamp in glazed white finish 5 x 55
$3.00
Sango China Tivoli 8305 5 Piece Place Setting Seashells  Flowers
Sango China Tivoli 8305 5 Piece Place Setting Seashells Flowers
$19.99
Antique Royal Bayrouth Sea Shell Cream Pitcher Iridescent glaze Blue Mark NR
Antique Royal Bayrouth Sea Shell Cream Pitcher Iridescent glaze Blue Mark NR
$14.99
1960S BELLEEK NEPTUNE TWISTED SEA SHELL VASE APPROX 3  HIGH X 4  WIDE
1960S BELLEEK NEPTUNE TWISTED SEA SHELL VASE APPROX 3 HIGH X 4 WIDE
$14.99
Ceramisia Italy Large Round Charger Platter SEASHELLS 13 3 8 Italian Pottery
Ceramisia Italy Large Round Charger Platter SEASHELLS 13 3 8 Italian Pottery
$35.99
3 VTG  Fitz and Floyd Seashell Variations  Mugs Brown Interior 1979
3 VTG Fitz and Floyd Seashell Variations Mugs Brown Interior 1979
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SeaScape Midwinter Bread  Butter Plate Stonehenge Wedgwood Seashells England
SeaScape Midwinter Bread Butter Plate Stonehenge Wedgwood Seashells England
$4.99
Berkshire Fine China Mini Seashell Plate coin holder Made in Japan
Berkshire Fine China Mini Seashell Plate coin holder Made in Japan
$3.99
EUC Vintage Royal Crown Floral Sea Shell Soap Trinket Pin Candy Dish Gilt China
EUC Vintage Royal Crown Floral Sea Shell Soap Trinket Pin Candy Dish Gilt China
$7.95
Homer Laughlin SEA SHELL DESIGN Salt  Pepper Shakers Unmarked Retired
Homer Laughlin SEA SHELL DESIGN Salt Pepper Shakers Unmarked Retired
$7.99
vtg Lefton China Sea Shell Lunch Snack Plate NE 20130FR Harvest Fruit HAND PAINT
vtg Lefton China Sea Shell Lunch Snack Plate NE 20130FR Harvest Fruit HAND PAINT
$1.99
LOT COLLECTION OF BELLEEK IRELAND CHINA NAUTICAL SHELL SEA OCEAN THEMED
LOT COLLECTION OF BELLEEK IRELAND CHINA NAUTICAL SHELL SEA OCEAN THEMED
$49.99
circa 1900 VICTORIAN 6 Tea Cups  Saucers with Scalloped Sea Shell edges
circa 1900 VICTORIAN 6 Tea Cups Saucers with Scalloped Sea Shell edges
$24.99
Vintage Royal Haeger Seashell Vase No R299 Green with Deep Blue Accents
Vintage Royal Haeger Seashell Vase No R299 Green with Deep Blue Accents
$9.95
FITZ  FLOYD CORAL SHELLS PATTERN 2 QT PITCHER 1989 SEASHELL STARFISH
FITZ FLOYD CORAL SHELLS PATTERN 2 QT PITCHER 1989 SEASHELL STARFISH
$19.95
Gonder Pottery Basket Blue Pink Seashell Twist Handle OrigSticker 1946 Ohio
Gonder Pottery Basket Blue Pink Seashell Twist Handle OrigSticker 1946 Ohio
$8.49
Lenox China Aegean Collection Sea Shell Riviera Ashtray or Trinket Dish 24K Trim
Lenox China Aegean Collection Sea Shell Riviera Ashtray or Trinket Dish 24K Trim
$21.75


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