Agatized Coral aka Fossil Coral
SpiritRock Shop
Museum Specimens
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Coral is made by millions of tiny animals called polyps that live in colonies which grow rapidly. One polyp can
become a colony of many thousands in a year. Each polyp builds a home of limestone around itself using calcium
from the water. The home surrounds the polyp like an apartment with a floor and walls and ceilings. After the polyp
dies its ceiling becomes the foundation for another polyp to build a home on. This is much like building high rises,
adding new floors with each generation of polyps. This process continues making more limestone formations and
eventually forms a coral reef.

Agate, or chalcedony, is a variety of cryptocrystalline quartz. It is found in a variety of colors, typically gray, brown,
black, white, and sometimes red. Fossil corals may be replaced with agate deposited by silica-rich ground water
percolating through limestone. In 1979 the Florida Legislature designated agatized coral as the Florida State Stone.
It is described in the statute as “a chalcedony pseudo morph after coral, appearing as limestone geodes lined with
botryoidal agate or quartz crystals and drusy quartz fingers, indigenous to Florida.”

Much of Florida’s natural foundation is composed of soft, highly-fossiliferous limestones intermixed with sand and
clay. This is known as the Early Miocene Tampa Formation. There are several distinct exposures of this formation
which produced silicified corals and mollusks; the best known of these is Ballast Point on Tampa Bay in Hillsborough
County. Six Mile Creek on a nearby Tampa Bay exposure of the same formation produced only calcareous
specimens.

Many Florida agatized coral locations, once open to collecting, are now closed. The best remaining collectible areas
are along the causeway and beaches of Honeymoon Island State Park near Dunedin, the river bed and banks of the
Suwannee River in the vicinity of and downstream from White Springs, and the bed of the Withlacoochee River near
Clyattvillle, Georgia. River collecting is best during times of low water. In addition, small creek beds and quarries in
many North Florida counties sometimes expose collectible agatized/silicified corals in small quantities.

Once in a while we stumble across a rare collectible find from years past. Last week, Linda at Ernies Rock Shop had
a visitor named Jim Roder. He is in his 70's and he had some very interesting specimens he sold to Linda that were
from his parents Rock Shop. Jim's mother and father were John and Clara Roder who owned and operated "Roders
Rock Shop and Coral Museum" on Old Hot Springs Road in Hot Springs, Garland County, Arkansas during the
1950's and 1960's. We found a few old photos...
...One taken for
June 26, 1963, Arkansas Gazette article "Rockhound Visits Coral Museum on Old Hot Springs
Road," The interior of cut geodes found at John and Clara Roder's rock shop in Hot Springs, Garland County,
Arkansas

...Another one taken for
May 3, 1960, Arkansas Gazette article "Hot Springs Pair Reveals Nature's Beauty in Cut
Coral," B1:2. Cut opened coral geodes found at John and Clara Roder's rock shop in Hot Springs, Garland County,
Arkansas.
These Agatized coral specimens are all from no later than the early 1960's and were collected by the Roder family
when Jim was a young boy. These are all the famous Tampa Bay Agatized Coral specimens collected at Ballast
Point, the most famous Agatized Coral producing locale in the world. These specimens are in high demand from all
types of collectors and have not been available for over 50 years.

We are listing many of the specimens form the Roders Coral Museum on SpiritRock Shop's site and Ernies Rock
Shop will be listing the more unique specimens that were from John and Clara Roders personal collection. These are
the finest coral specimens we have seen in MANY years! When these are gone...there are no more available. All
specimens from Roders Museum will be listed as Tampa Bay Ballast Point specimens from Roders Coral Museum
Item # AC11118774
Withlacoochee River Florida Agatized Coral

$125.00
Excellent Withlacoochee River Florida Agatized Coral
This is an excellent specimen of a fully agatized fossil coral colony where the internal
chambers that once housed the polyps have been converted to amber chalcedony. This
specimen shows the internal stacked chambers preserved in translucent amber agate
form. The rich color is stunning as is the detail. This is from the Oligocene Period about
38 million years ago. The cut face is polished and there is a thin top or end section with
actual openings which aid in viewing the amazing internal structures. This example has
botryoidal preservation of the internal chambers of the original coral head visible in
several areas.
This specimen weighs 1 lb (449g) and measures 4.4 x 3.9 x 3.6 inches (11.2 x 9.9 x 9.1cm)
Item # AC10167891
Fossilized Coral Agate Key
West Florida Pair

$30.00
This is an excellent cut specimen pair of a fully agatized fossil coral.  This
specimen we picked up from a Key West, Florida Mineral Dealer at the Quartzite
Rock and Mineral Show in 2005 has been in our personal Fossil and Ocean
Collection. This coral was sawed open exposing a stunning drusy coated
botryoidal agate vug in each of the two halves. This is an excellent display with
shown label.
This specimen pair weighs 4 oz or 0.25 lb (114g)
the halves measures 3.8 x 1.49 x 0.92 inches (9.7 x 3.7 x 2.3cm)
and 3 x 1.4 x 0.74 inches (7.6 x 3.5 x 1.8cm)
June 26, 1963
Arkansas gazette Little Rock, Ark. Ernie Deane [photographer]
.
"Rockhound Visits Coral Museum on Old Hot Springs
Road,"
May 3, 1960
Arkansas gazette Little Rock, Ark. Ernie Deane [photographer].
"Hot Springs Pair Reveals Nature's Beauty in Cut Coral,"
Item # 1ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$120.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has black, tan, grey and white botryoidal
agate formations with fine hair like acicular growth on the spheroids. This coral
was cut and polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 4.8 oz or 0.3 lb (137g)
the halves measures 4.5 x 1.7 x 0.7 inches (11.5 x 4.5 x 1.7cm)
and 3.7 x 1.8 x 0.6 inches (9.5 x 4.6 x 1.5cm)
On Reserve
for Patrick
Item # 2ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$70.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has smoky honey tan, grey and white
botryoidal agate formations with botryoidal cream vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 5.9 oz or 0.37 lb (168g)
the halves measures 4.9 x 2.2 x 0.7 inches (12.5 x 5.7 x 1.8cm)
and 4.8 x 2 x 0.6 inches (12.3 x 5.3 x 1.6cm)
Item # 3ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$70.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has two sections. One is drusy coated
dark honey tan, grey and white botryoidal agate formations and a smaller
second with botryoidal cream vugs. This coral was cut and polished at the
Roder's Rock Shop and Coral Museum .
This specimen pair weighs 8.9 oz or 0.55 lb (253g)
the halves measures 3.9 x 3.2 x 1 inches (10 x 8.1 x 2.7cm)
and 4 x 2.8 x 0.9 inches (10.3 x 7.2 x 2.4cm)
Item # 4ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$85.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has black edges with white botryoidal
agate formations in the vugs. This coral was cut and polished at the Roder's
Rock Shop and Coral Museum .
This specimen pair weighs 3.7 oz or 0.23 lb (107g)
the halves measures 4.5 x 1.8 x 0.9 inches (11.5 x 4.7 x 2.3cm)
and 4.5 x 1.7 x 0.6 inches (11.5 x 4.5 x 1.7cm)
Item # 5ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$60.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has carnelian edges with white-grey
botryoidal agate formations in the vugs. This coral was cut and polished at the
Roder's Rock Shop and Coral Museum .
This specimen pair weighs 4.8 oz or 0.3 lb (138g)
the halves measures 4.5 x 1.8 x 0.8 inches (11.5 x 4.7 x 2cm)
and 4.1 x 1.8 x 0.7 inches (10.4 x 4.7 x 1.9cm)
Item # 6ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$65.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges with white botryoidal
agate formations in the vugs. This coral was cut and polished at the Roder's
Rock Shop and Coral Museum .
This specimen pair weighs 3.8 oz or 0.24 lb (110g)
the halves measures 5.2 x 1.4 x 0.6 inches (13.2 x 3.7 x 1.6cm)
and 5 x 1.2 x 0.4 inches (12.8 x 3 x 1cm)
Item # 7ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$110.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has dark honey edges with layered white,
grey, cream, tan and blue botryoidal agate formations in the vugs. This coral
was cut and polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 5.3 oz or 0.33 lb (151g)
the halves measures 5 x 1.6 x 0.9 inches (12.9 x 4.1 x 2.3cm)
and 5 x 1.5 x 0.8 inches (12.7 x 4 x 2.1cm)
Item # 8ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$70.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges with large honey, white
and cream botryoidal agate formations in the vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 8.8 oz or 0.55 lb (251g)
the halves measures 3.4 x 2.8 x 0.9 inches (8.8 x 7.2 x 2.4cm)
and 3.6 x 2.6 x 0.8 inches (9.1 x 6.8 x 2.2cm)
Item # 9ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$70.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges with large honey, white,
grey, blue-grey and cream botryoidal agate formations in the vugs. This coral
was cut and polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 7 oz or 0.43 lb (199g)
the halves measures 3.9 x 2.3 x 1 inches (10 x 6 x 2.6cm)
and 3.9 x 2.3 x 0.8 inches (10 x 5.8 x 2.1cm)
Item # 10ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$65.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges and fill with with honey,
white, and cream botryoidal agate formations in the vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 6.4 oz or 0.4 lb (183g)
the halves measures 4.5 x 2.4 x 0.8 inches (11.6 x 6.1 x 2.1cm)
and 4.6 x 2.4 x 0.9 inches (11.9 x 6.3 x 2.4cm)
Item # 11ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$70.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has "carnelian and ice" botryoidal drusy
agate formations in the vugs. This coral was cut and polished at the Roder's
Rock Shop and Coral Museum .
This specimen pair weighs 6.4 oz or 0.4 lb (183g)
the halves measures 3 x 1.9 x 1.3 inches (7.8 x 5 x 3.4cm)
and 3.1 x 2 x 0.8 inches (7.9 x 5.1 x 2.1cm)
Item # 12ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$80.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has a honey edges with large white
botryoidal agate formations in the vugs. This coral was cut and polished at the
Roder's Rock Shop and Coral Museum .
This specimen pair weighs 5.8 oz or 0.36 lb (165g)
the halves measures 3.5 x 2.6 x 0.7 inches (8.9 x 6.8 x 1.8cm)
and 3.6 x 3.1 x 0.6 inches (9.3 x 7.9 x 1.6cm)
Item # 13ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$80.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has dark honey edges with large white
and blue-grey-black botryoidal agate formations in the vugs. This coral was cut
and polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 6.2 oz or 0.39 lb (177g)
the halves measures 2.9 x 2.1 x 1.2 inches (7.6 x 5.5 x 3.1cm)
and 3.1 x 2 x 0.8 inches (8 x 5.1 x 2.1cm)
Item # 14ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$50.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges with honey and cream
minor botryoidal agate formations in the vugs. This coral was cut and polished
at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 5 oz or 0.31 lb (143g)
the halves measures 3.6 x 2.5 x 1 inches (9.3 x 6.3 x 2.5cm)
and 3.7 x 2.5 x 0.6 inches (9.5 x 6.5 x 1.7cm)
Item # 15ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$50.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges with honey and cream  
botryoidal agate formations in the vugs. This coral was cut and polished at the
Roder's Rock Shop and Coral Museum .
This specimen pair weighs 6 oz or 0.37 lb (172g)
the halves measures 4.2 x 3 x 0.6 inches (10.8 x 7.7 x 1.6cm)
and 3.9 x 2.8 x 0.6 inches (10 x 7.3 x 1.6cm)
Item # 16ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Double
from Roders Coral Museum

$70.00
This is an excellent cut specimen of a fully agatized fossil coral single side with
two chambers from the Roder Coral Museum.  This specimen has honey edges
with honey, blue-grey and cream  botryoidal agate formations in the vugs. This
coral was cut and polished at the Roder's Rock Shop and Coral Museum .
This specimen weighs 5.8 oz or 0.36 lb (165g)
the halves measures 4.9 x 3.3 x 0.8 inches (12.5 x 8.5 x 2cm)
the 2nd chamber is 4 inches long (10.3cm)
Item # 17ACLR02170001
Tampa Bay Ballast Point
Fossilized Coral Agate Pair from  
Roders Coral Museum

$50.00
This is an excellent cut specimen pair of a fully agatized fossil coral from the
Roder Coral Museum.  This specimen has honey edges with honey, blue-grey
and cream  botryoidal agate formations in the vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .
This specimen pair weighs 6.7 oz or 0.42 lb (191g)
the halves measures 3.8 x 2.5 x 0.7 inches (9.6 x 6.3 x 1.8cm)
and 3.4 x 2.4 x 0.7 inches (8.7 x 6.1 x 1.9cm)
Item # 18ACLR02170050
Tampa Bay Ballast Point
Fossilized Coral Agate Half from  
Roders Coral Museum

$50.00
This is an excellent cut specimen single half of a fully agatized fossil coral from
the Roder Coral Museum.  This specimen has honey edges with honey,
blue-grey and cream  botryoidal agate formations in the vugs. This coral was cut
and polished at the Roder's Rock Shop and Coral Museum .

This specimen weighs 4.7 oz or 0.29 lb (135g)
the half measures 4.7 x 2.8 x 0.8 inches (12.1 x 7.2 x 2cm)
Item # 19ACLR02170050
Tampa Bay Ballast Point
Fossilized Coral Agate Half from  
Roders Coral Museum

$45.00
This is an excellent cut specimen single half of a fully agatized fossil coral from
the Roder Coral Museum.  This specimen has dark honey edges with honey,
blue-grey and cream  botryoidal agate formations in the vugs. This coral was cut
and polished at the Roder's Rock Shop and Coral Museum .

This specimen weighs 3.4 oz or 0.21 lb (98g)
the half measures 3.3 x 2.8 x 1 inches (8.5 x 7.1 x 2.7cm)
Item # 20ACLR02170050
Tampa Bay Ballast Point
Fossilized Coral Agate Half from  
Roders Coral Museum

$45.00
This is an excellent cut specimen single half of a fully agatized fossil coral from
the Roder Coral Museum.  This specimen has dark honey edges with honey,
and cream  botryoidal agate formations in the vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .

This specimen weighs 4.1 oz or 0.26 lb (119g)
the half measures 5.6 x 2.7 x 0.7 inches (14.2 x 6.9 x 1.9cm)
Item # 21ACLR02170050
Tampa Bay Ballast Point
Fossilized Coral Agate Half from  
Roders Coral Museum

$45.00
This is an excellent cut specimen single half of a fully agatized fossil coral from
the Roder Coral Museum.  This specimen has dark honey edges with blue-grey,
white and cream  botryoidal agate formations in the vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .

This specimen weighs 4 oz or 0.25 lb 113g)
the half measures 4.9 x 2.8 x 0.9 inches (12.5 x 7.1 x 2.5cm)
Item # 22ACLR02170050
Tampa Bay Ballast Point
Fossilized Coral Agate Half from  
Roders Coral Museum

$45.00
This is an excellent cut specimen single half of a fully agatized fossil coral from
the Roder Coral Museum.  This specimen has dark honey edges with blue-grey,
white and cream  botryoidal agate formations in the vugs. This coral was cut and
polished at the Roder's Rock Shop and Coral Museum .

This specimen weighs 3.3 oz or 0.2 lb (94g)
the half measures 3.4 x 2.4 x 0.6 inches (8.7 x 6.1 x 1.6cm)
Item # 23ACLR02170050
Tampa Bay Ballast Point
Fossilized Coral Agate Half from  
Roders Coral Museum

$45.00
This is an excellent cut specimen single half of a fully agatized fossil coral from
the Roder Coral Museum.  This specimen has dark honey edges with white and
cream  botryoidal agate formations in the vugs. This coral was cut and polished
at the Roder's Rock Shop and Coral Museum .

This specimen weighs 4.8 oz or 0.3 lb (138g)
the half measures 5 x 2 x 0.8 inches (12.7 x 5.3 x 2.2cm)