Indonesia

Grape Agate Chalcedony Cluster – Botryoidal – Sulawesi, Indonesia

SKU · ne035
$77.27
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Botryoidal chalcedony from Sulawesi: dozens of lavender spheres packed over a violet-grey base, with a small group turning sea-green at one edge and pale cream matrix crusting the ends. 7.4 cm across, 120 g.

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Authenticity guaranteed
Hand-examined + numbered
Worldwide shipping
Insured tracked delivery
Display-ready
Acrylic base included
14-day return
No-questions return window

Specimen details

MineralQuartz
LocalityIndonesia
Crystal systemHexagonal
Chemical formulaSiO₂
Dimensions7.4 cm × 3.3 cm × 5.3 cm
Weight120 g
ColorNot specified
SizeSmall Cabinet (2–4 inches / 5–10 cm)
SpeciesChalcedony
ConditionNo damage on display faces

Tags

Botryoidalrare mineralunique formationspecimenClusteragategeologygrape agateindonesiaUnder $100gemstoneUnder $250agate specimenmineralogy

About this specimen

Dozens of small lavender spheres crowd the top of this Sulawesi chalcedony, packed tight in the centre and loosening into isolated domes toward the edges, all of them sitting on a darker violet-grey base. Along the lower right a cluster shifts to sea-green, and pale cream matrix crusts cling at both ends where the piece came away from its host rock. The surface has the soft waxy sheen typical of the material rather than a glassy shine.

Chalcedony is silica, SiO2, built from fibres too fine to see; the botryoidal habit forms when silica-rich fluid coats a cavity in volcanic rock and grows outward from countless seed points, each rounding into its own hemisphere. The trade name follows the look, not the chemistry. It also means a forgiving specimen: at Mohs 6.5 to 7 it handles far better than the soft carbonates sharing its shelf.

It measures 7.4 × 3.3 × 5.3 cm and weighs 120 g, sized to sit in the palm as photographed. No stand is included; the piece balances on its matrix edge. These images were taken of this exact cluster.

About Quartz

Quartz is a silicate mineral prized by collectors for its exceptional color range, with several world-class Chinese localities.

Learn more about Quartz in our encyclopedia

About Indonesia

Indonesia, a volcanic archipelago, is best known among collectors for native sulfur from its active volcanoes, alongside gold-silver and base-metal deposits.

More specimens from this locality

Frequently asked questions

Will I receive the exact specimen shown?

Yes. Every specimen is a single, one-of-a-kind piece, and the photographs show the exact item you will receive — never a stock photo.

Is this Quartz natural?

Yes — specimens like this form naturally. As is standard in the trade, some pieces are gently cleaned or trimmed; we photograph the actual specimen and describe its origin and condition conservatively.

How is it packed and shipped?

Orders ship worldwide with fully insured, tracked delivery, carefully packed to protect fragile crystals. A display base is included.

Can I return it?

Yes — there is a 14-day return window.

What collectors say

★★★★★4.97· Verified reviews
Grape Agate Chalcedony Cluster – Botryoidal – Sulawesi, Indonesia
Grape Agate Chalcedony Cluster – Botryoidal – Sulawesi, Indonesia
$77.27