18.44 lb Kentucky Thunder Egg Geode — Lincoln County — Nodular Chalcedony — Unop
$184.99+ $7.99 shipping · total at checkout
- SizeOS
- ConditionNew with tags
Size and condition above come from the listing. The description below is the seller’s own text.
Exact Specimen shown in photosMUSEUM-GRADE KENTUCKY SPECIMENThis exceptional 18.44-pound nodular chalcedony formation represents a premier example of East-Central Kentucky's silica mineral deposits. Collected from the Waynesburg area of Lincoln County, Kentucky, this unopened thunder egg type geode offers significant collector value through its substantial size, authentic provenance, and untapped interior potential.GEOLOGICAL ORIGINSLincoln County, Kentucky sits within the Mississippian-age limestone and shale formations of the East-Central Kentucky chalcedony belt. This region's sedimentary bedrock—deposited approximately 323-359 million years ago—created ideal conditions for silica-rich solutions to permeate cavities and fractures, gradually crystallizing into chalcedony nodules and agate formations.The distinctive botryoidal (grape-like) surface texture visible on this specimen indicates classic silica deposition patterns. These formations typically develop through slow, layered precipitation of microcrystalline quartz within ancient gas pockets, mud cracks, or fossil cavities. Kentucky specimens are particularly noted for fine-grained structure and potential for colorful banding when sectioned.SPECIMEN SPECIFICATIONS:Attribute MeasurementWeight 18.44 lbs (8.36 kg)Circumference 25.5 inches (64.8 cm)Approximate Diameter ~11 inches (27.9 cm)Specific Gravity Dense, heavy formation indicating solid silica compositionExterior Texture Natural botryoidal / bumpy nodular surfaceColoration Earth-tone matrix: beige, gray, cream, with brown variegationInterior Status Unopened / Unsliced — contents unknownStructural Integrity Solid, self-supporting, stable for displayCOLLECTOR & INVESTMENT VALUEProvenance Premium: Documented Lincoln County, Kentucky origin distinguishes this from generic unlocated material. Regional specimens attract dedicated Kentucky agate collectors and geological educators.Unopened Mystery: The interior composition remains untouched—potential outcomes include:• Solid chalcedony core suitable for lapidary work• Concentric agate banding in Kentucky's characteristic color palette• Crystal cavity with quartz or calcite formations• Fossil replacement patterns (crinoid, coral, or mollusk structures common to the region)Display Presence: At 18+ pounds and 25.5" circumference, this specimen commands attention in home, office, or educational settings. Natural pod-like form requires no stand or support.CONDITION REPORT• Surface: Natural weathering consistent with field-collected material; minor residual soil in surface recessions• Treatments: None. No dye, heat treatment, artificial enhancement, or coating• Flaws: Natural fractures and irregularities inherent to geological formation; structurally sound with no active cracks compromising integrity• Odor: Neutral / faint natural earth scentPRICING$184.00 — Calculated at $10.00 per pound. Firm pricing reflects specimen size, documented Kentucky provenance, and current market rates for unopened regional thunder eggs exceeding 15 pounds.Packaging: Double WrappedHandling Time 1-2 business days after payment clearanceKEYWORDS FOR SEARCH OPTIMIZATIONKentucky geode, Lincoln County thunder egg, Waynesburg chalcedony, nodular agate, unopened geode, botryoidal specimen, large mineral specimen, Kentucky agate, Mississippian formation, lapidary rough, natural history display, geology teaching specimen, silica nodule, crinoid fossil potential, collector rockQUESTIONS?Contact for additional photographs, video inspection, or specific measurement requests. Serious inquiries only.
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18.44 lb Kentucky Thunder Egg Geode — Lincoln County — Nodular Chalcedony — Unop
$184.99
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