W007 / Utah

Dugway geodes

Quartz/chalcedony-filled volcanic geodes

A plain rounded exterior can hide a pale quartz-lined cavity or a solid banded interior. A cut half is more useful for comparison than its rind alone.

← Western Lapidary Materials
Verified reference photograph pending

What it is

Quartz/chalcedony-filled volcanic geodes

What to look for

A plain rounded exterior can hide a pale quartz-lined cavity or a solid banded interior. A cut half is more useful for comparison than its rind alone.

At the cutting bench

Inspect the actual piece for fractures, voids and cutting orientation. Deposit-specific yield and polish data are UNKNOWN.

Under the loupe

A round silica-filled nodule is not automatically a Dugway specimen; distinguish hollow geodes from solid fills.

Source & collecting access

UGS updated access information in May 2020. Recheck BLM conditions before travel; do not treat the page as a verified 2026 claim search.

Status checked 2026-10-01

The market notebook

UNKNOWN — no verified completed-sales sample sufficient for a range

Market researched 2026-10-01

Open the field notes

Color comparison tags

White/Cream/Clear, Purple/Lavender, Pink, Brown/Tan

Geology & evidence limits

UGS links the cavities to Miocene rhyolite, followed by mineral-bearing groundwater and later redistribution by Lake Bonneville.

Collecting & trade history

UGS updated access information in May 2020. Recheck BLM conditions before travel; do not treat the page as a verified 2026 claim search.

Reading old-stock material

Preserve the estate label, wrapping, purchase record and associated pieces. Old-stock status alone does not authenticate origin or imply a premium.

What we know—and what we don’t

Visual resemblance is a comparison clue, not proof of material identity, locality or documented provenance. Keep source labels and estate records separate from your visual assessment.

C&C Reference Collection

Reference photograph pending. Do not substitute an unlicensed dealer image or a similar-looking specimen of uncertain identity.

Sources & Further Reading
  1. UGS: Dugway geodes

    Geology and access updated May 2020; not a 2026 parcel check

Cut and polish with appropriate wet methods and silica-dust controls. Historic directions and mine names are not current permission to collect.