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Plume Agate Glow!
Thunderegg Inspection!
Love the tiny green inside!
Dark reds!
Boring!
Globular cut!
Bout' lost a finger on this one!
Big nodule cut!
Blah!
Bulbas glob cut!
Geode Cut!
Robbed! Grabbed the wrong half!
Brecciated Jasper Cut!
Thunderegg Cut!
Brecciated Ball of Jasper Cut!
Geode Cut!
Crazy Lace Agate Cut!
Big Daddy Plume Cut!
Brecciated Jasper Cut!
Thunderegg Cut w/Opal!
Thundereggs?
Chalcedony & Crazy Lace Cut!
Plume w/CrazyLace cut!
Thought it would be three thundereggs!?!?
Thunderegg twins!
Love the green inside!
Chert, I think!
Bo-ring!
Filled with Eartones!
Was hoping for more color!
Oops!
More earthtones and opal inside!
2nd cut!
Looking for colors!
Beautiful Colors!
Cross section cut!
Is it a Thunderegg?
What's inside this Thunderegg?!?
Thought it would be more colorful inside!
Pretty inside!
Circular Formation!
Pink layers!
Clear/White Banding!
Tiny Thundereggs!
Was hoping for more red iside!
Solid Color Inside!
Pink n' White Inside!
Nice colors!
What colors are inside?!?
Same as the outside!
White Chalcedony Inside!
Took forever to cut this one!
Thought this Thunderegg would be hollow!
Nice cut!
Time to cut!
Big nodule cut!
An agate nodule refers to a naturally occurring, rounded lump or mass of agate, a common variety of chalcedony and quartz. Agate nodules are prized for their beauty, with layers of different colors and patterns, often formed in volcanic rocks or ancient lava flows. Here's a detailed look at agate nodules:
Formation:
Volcanic Origins: Agate nodules typically form in cavities within volcanic rocks, such as basalt or rhyolite. When lava cools, gas bubbles can become trapped, creating cavities. Over time, silica-rich water fills these cavities, depositing layers of agate.
Layer Formation: The layers or bands in agate nodules are formed through successive depositions of silica from water. Each layer can represent a different period of deposition, with variations in color and pattern due to changes in the mineral content of the water or the environment.
Silica Deposition: As the silica-rich solution fills the cavity, it begins to crystallize from the outer edge towards the center. This can result in concentric layers or bands, giving agate its characteristic appearance.
Characteristics:
Banded Structure: Agate nodules are known for their banded or layered structure. These bands can range in color from white to grey, blue, red, brown, and even black, often in a single nodule.
Durability: Due to their quartz composition, agate nodules are relatively hard (around 7 on the Mohs scale), making them durable for use in jewelry or as decorative stones.
Size: Nodule sizes can vary significantly, from small pebbles to larger masses several inches in diameter. The size often depends on the original cavity size in the volcanic rock.
Types of Agate Nodules:
Banded Agate: Features distinct, often colorful bands, which are agate's most recognized form.
Fortification Agate: Has a pattern that resembles fortifications or landscapes, with sharp, angular lines.
Moss Agate: Not a true agate as it lacks banding but contains moss-like inclusions of green minerals.
Fire Agate: Known for its fiery appearance due to the way light refracts through its layers, often with a botryoidal surface.
Uses:
Jewelry: Agate nodules are cut and polished for use in a variety of jewelry, including rings, pendants, and beads.
Decorative Items: Larger nodules can be carved or polished for use as bookends, paperweights, or display pieces.
Gemstone: When cut into cabochons or faceted, agate from nodules can serve as a gemstone in more formal jewelry settings.
Healing and Metaphysical: Agate is believed by some to have healing properties or to bring balance and protection, leading to its use in alternative medicine or as a talisman.
Collection and Cutting:
Collection: Agate nodules are often found in riverbeds, beaches, or in the field where volcanic rocks outcrop. Collectors might find them as loose nodules or still embedded within the host rock.
Cutting: To reveal the internal beauty, agate nodules are typically cut in half or into sections. This exposes the layers and bands, which can then be polished to a high gloss.
Agate nodules, with their diverse patterns and colors, offer a fascinating glimpse into geological processes, making them not only beautiful but also scientifically interesting. Their wide availability and variety make them accessible to both professional gem cutters and amateur enthusiasts, contributing to their popularity in both the gemological world and as natural art pieces.
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