W044 / Oregon

Blue Mountain jasper

Trade/locality-named patterned silica

Blue Mountain jasper is worth comparing when a slab combines blue-green patches and overlapping rounded patterns. That resemblance is the start of an investigation, not the end.

← Western Lapidary Materials
Reference photograph pending

What it is

Trade/locality-named patterned silica

What to look for

A source-labelled Mindat example describes blue to blue-green overlapping orbs with yellow and mossy-looking areas. This is a specimen description, not the full range of the material.

At the cutting bench

Inspect fractures and contrast on the actual slab. No deposit-wide cutting yield or polish guarantee was established.

Under the loupe

Do not equate a trade name with any blue jasper, or confuse the named Malheur locality with every material from the Blue Mountains. Documentary provenance is needed.

Source & collecting access

Current production and permission to collect are UNKNOWN. A mineral database location is not a current access guide.

Status checked 2026-10-03

The market notebook

No verified realized-price range was established for this entry. Asking prices and sold labels are not interchangeable.

Market researched 2026-10-03

Open the field notes

Formation & evidence

Mindat indexes a Blue Mountain locality in Malheur County with jasper/quartz records. Detailed deposit geology was not accessible in this pass. Formation, boundaries and geological age remain UNKNOWN here.

Collecting & trade context

This comparison entry preserves the recognized name for sorting old stock. Its deposit history is incomplete, and its colors cannot authenticate an inherited unlabelled piece.

Reading an old label

Preserve labels, dates, wrapping and associated pieces. Visual resemblance, material identity, locality attribution and documented provenance are separate conclusions.

What we know—and what we don’t

Visual resemblance can narrow a comparison. Material identity, locality attribution and documented provenance need separate evidence.

C&C Reference Collection

Source-labelled reference examples are linked below. Images without explicit reuse permission are not reproduced.

Sources & Further Reading
  1. Mindat: Blue Mountain, Malheur County

    Indexed locality evidence; full page returned 403 during research. Detailed geology not verified.

  2. Mindat: source-labelled Blue Mountain jasper photograph

    Indexed photographer description; image license not cleared. Duplicate specimen pages are not independent evidence.

Historic locality information is not current collecting permission. For cutting, use suitable dust controls and material-specific safety guidance.