Obsidian Specimen Labels and Provenance

For a private obsidian collection, provenance is the recorded history attached to a specimen. It may include where the piece was collected, who collected it, when it entered a collection, where it was purchased or traded, and what older labels or records came with it.

Provenance is not the same as material identity. A label that says “obsidian” gives the broad material category: volcanic glass. It does not identify the exact flow, quarry area, collecting site, seller source, or earlier collection. A more detailed variety name, such as a color or sheen term, still does not establish origin unless the locality and supporting records are present.

Read a label as a stack of separate claims:

A useful obsidian label is short enough to stay with the stone and structured enough to keep different facts from blurring together. The point is not to make every private collection look like a museum catalog. The point is to avoid losing information.

When available, record:

An obsidian locality label should be read as a record first, not as automatic proof. Some labels are precise and well supported. Others are broad, copied from seller language, or separated from the stone long before you received it.

Start with the wording. “Mexico” is broad. “Near a named town” is more useful, but still needs context. A specific collecting site, date, and collector name gives more to work with. If the note also matches a catalog number, receipt, or field notebook entry, the locality is better documented.

A locality statement may be:

Visual comparison is tempting with obsidian because color, sheen, banding, snowflake-like cristobalite patterns, and mahogany tones are easy to notice. Those features can help describe a specimen, but they do not establish origin on their own. Similar-looking obsidian may be sold under different names, and polish can emphasize traits that are not locality-specific.

For most private collections, the right locality is the most specific wording that came with the specimen, without adding detail that is not documented. If an old label says “Oregon,” do not upgrade it to a specific collecting area because the piece resembles photos. Preserve the old wording and add a modern note: “Older label gives Oregon only; exact locality not recorded.”

A seller label and a collector label serve different purposes. A seller label may identify a product, make a variety name recognizable, or give a broad source description. A collector label should preserve specimen information and separate fact, claim, and uncertainty.

A shop card might say “rainbow obsidian,” “gold sheen obsidian,” or “Mexican obsidian.” Those words can be useful as received language, but they should not automatically become your final provenance statement. “Rainbow obsidian” describes an appearance or market category. “Mexican obsidian” may be a broad seller-provided locality. Neither phrase, alone, records the collection site, collector, date, or chain of custody.

A collector label can keep the seller wording without overstating it:

This preserves what the seller said while keeping the level of support visible. Many collection errors begin when cautious wording such as “sold as” is copied later as a confirmed locality.

The same caution applies to private collection cards. A neat label in a tray may be useful evidence of what a prior collector recorded, but its strength depends on the information behind it.

Old handwritten labels are often worth keeping even when they are messy, incomplete, or written in outdated terms. They can preserve earlier wording, prior ownership, older locality names, collection numbers, and the way a specimen moved through collections.

They do have limits. An old-looking label may have been copied from another label, written years after collection, or paired with the wrong specimen at some point. Age can make a label interesting, but not automatically accurate.

When you receive an obsidian specimen with an older note, resist the urge to replace it with a cleaner, more confident version. A better method is to keep both:

If the old label has abbreviations, do not expand them as fact unless the meaning is clear. “Coll.” may mean collected by or collection of, depending on context. “Loc.” usually points to locality, but the precision still depends on the wording. “Ex.” often indicates a prior collection, but the label should make clear whose collection is meant if known.

Small tumbled obsidian pieces create a practical problem: they are easy to separate from their records. Once a group of similar black stones is mixed, a label may no longer apply to any one piece with confidence.

For small stones, keep the label at the batch level unless individual identity is clear. If you buy ten tumbled stones in one packet with one seller card, label the packet or tray cell as a group:

If one stone came with its own small card, keep it in a separate bag or compartment. Do not later assign that card to another similar piece. For tiny stones, a catalog number can go on the container rather than the stone itself. A photo of the stone beside the label can also help maintain the association.

When a mixed lot contains several variety names, avoid over-sorting by guesswork. A black tumbled stone, a sheen stone, and a snowflake-patterned stone may be visually distinguishable, but their original source information can still be unknown. The label should say that clearly:

Field-collected obsidian can have strong provenance when the collector records details at the time of collection. It can also become vague quickly if the piece is stored without notes.

For a field-collected specimen, useful details include:

Public-land and access rules vary by place and date. General rockhounding guidance is useful background, but a private label should not turn it into a legal conclusion. A label can record “collected during permitted club trip” if that is what the records say, but it should not say more than the documentation supports.

For purchased field-collected material, keep the chain visible:

Most private specimens will sit in the middle. That is normal. The goal is not to force every piece into the strongest category. The goal is to stop a weak record from being repeated as a strong one.

When the locality is unknown, do not leave the field blank if that might invite later invention. Write “locality unknown” or “no locality data.” When a locality is plausible but not documented, use “reported,” “labeled as,” or “claimed.” When the source is clear, name it: old label, seller tag, family note, prior collection card, or field notebook.

Yes. Keep original labels whenever possible, even if you add a clearer modern label. Original labels can carry information that is not visible in the stone: older locality wording, collector names, former catalog numbers, acquisition routes, and the exact language used when the specimen entered a collection.

Do not overwrite an old label’s uncertainty with a cleaner story. If the original says “Apache tears, Arizona?” keep the question mark in your transcription. If it says only “obsidian,” do not add a locality unless another record supports it. If a seller card uses a variety name, keep it as seller language rather than turning it into provenance.

A simple preservation habit is enough for most collectors: