OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 17 shown for “Chalcedony oval gem” — 64 records examined, 35 dropped by the rights gate.
Archives queried 2026-08-28 07:39 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Chalcedony oval gem
Artist not stated in the record · 2nd century BCE
![Quartz (var. chalcedony) [Petrified wood]](/_next/image?url=https%3A%2F%2Fids.si.edu%2Fids%2Fdownload%3Fid%3DNMNH-06k0060-G5359-00.jpg&w=3840&q=75)
Quartz (var. chalcedony) [Petrified wood]
Artist not stated in the record
Drop-front desk (secrétaire à abattant or secrétaire en cabinet)
Adam Weisweiler · ca. 1787
Design for Brooch with Winged Half Figures
Artist not stated in the record · 16th century
Miniature secretary incorporating a watch
James Cox · ca. 1766–72
Design for a Strapwork Brooch
Artist not stated in the record · 16th century
Nécessaire
James Cox · ca. 1770–72
Plate 3, from Livre de bijouterie (Book of Designs for Goldsmiths and Jewelers)
René Boyvin, French, 1525 - 1625 · ca. 1570
Chalcedony scaraboid
Epimenes · ca. 500 BCE
Designs for a Bracelet and Brooch
Artist not stated in the record · ca. 1875
Banded agate oval gem
Artist not stated in the record · late 4th–3rd century BCE
Carnelian oval engraved gem
Artist not stated in the record · 1st century BCE–1st century CE
Pendant Brooch with Cameo of Enthroned Virgin and Child and Christ Pantokrator
Artist not stated in the record · late 1000s–1100s (cameo); 1100s–1300s (mount)
Sard oval
Artist not stated in the record · 3rd century BCE
Carnelian oval
Artist not stated in the record · 2nd–1st century BCE
Carnelian oval
Artist not stated in the record · 3rd century BCE
Disk Brooch with Cameo
Artist not stated in the record · ca. 600 (mount); 100–300 (cameo)
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 703 matched · 24 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 10623 matched · 40 examined · 35 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.5 shown
These figures describe the pass run at 2026-08-28 07:39 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.