
Graveyard Point Agate
Silicon dioxide (SiO2) - chalcedony quartz
A celebrated plume agate from the Oregon-Idaho border, known for dramatic black, gold, and red plumes in clear chalcedony.
- Mohs hardness
- 6.5-7
- Color
- clear to white chalcedony with black, gold, and red plumes
- Type
- gemstone
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Overview
Graveyard Point Agate is a famous plume agate from the Graveyard Point area straddling the Oregon-Idaho border near the Owyhee region. It is prized for bold, well-defined plumes - often black, gold, brown, or red - suspended in clear to milky chalcedony.
A chalcedony (cryptocrystalline quartz), it is regarded as one of the premier plume agates of the American West. Lapidaries value its dramatic three-dimensional inclusions and the way thin slices reveal intricate, garden-like internal scenes.
Formation & geology
Graveyard Point Agate formed in cavities and seams within the volcanic rocks of the Owyhee region. Silica-rich groundwater filled these voids, and prior to or during chalcedony deposition, iron- and manganese-bearing minerals crystallized as branching, feathery plumes.
As the clear silica continued filling the cavity, these plume structures were sealed inside, producing the three-dimensional inclusions seen today. Successive solution pulses created the layered chalcedony and varied plume colors. The agate is recovered from claims in the Graveyard Point district along the Oregon-Idaho state line.
How to identify it
Look for plumes - feathery, three-dimensional growths in black, gold, brown, or red - suspended within translucent or clear chalcedony. Rotating a slab confirms the plumes are inside the stone.
Standard agate properties apply: Mohs 6.5-7, white streak, waxy to vitreous luster, conchoidal fracture. Its plumes are typically bolder and more colorful than the fine feathers of some other plume agates. Distinguish it from dendritic agate (flat fern-like dendrites) and from moss agate (mossy green inclusions). Provenance from the Owyhee/Graveyard Point area aids identification.
Uses & significance
Graveyard Point Agate is a top-tier lapidary stone, sliced and cut into cabochons that showcase its plumes; cutters carefully orient rough to capture the best scenes. It is made into pendants, rings, and collectible display slabs.
Fine plumed specimens are highly valued among agate collectors and can be expensive. As with other agates, any metaphysical attributes are traditional rather than scientifically supported.
Frequently asked questions
Where is Graveyard Point agate found?
In the Graveyard Point district on the Oregon-Idaho border within the Owyhee region of the American West.
What makes Graveyard Point agate special?
Its bold, well-defined black, gold, and red plumes suspended in clear chalcedony make it a premier plume agate.
What are the plumes made of?
Iron- and manganese-bearing minerals that crystallized as feathery growths and were sealed inside the silica.
How is it cut?
Lapidaries slice and orient the rough to center the most attractive plumes in cabochons and display slabs.
Graveyard Point Agate guides
In-depth guides for identifying, valuing, and understanding Graveyard Point Agate.
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