Are the gemstones shown for sale?

The current gallery is educational. NumisTrends displays a price and availability only when a specific stone is ready to offer.

What information matters when comparing gemstones?

Compare species and variety, carat weight, dimensions, cut, color, clarity, treatments, origin claims, laboratory reports, and return terms.

Can I request a specific stone?

Yes. Share the stone, budget, timing, and qualities that matter to you. NumisTrends will reply with the next practical step.

NumisTrends Gemstone Gallery

REAL STONES. REAL DETAIL.

Find the one that catches your eye.

Select a stone to inspect its real photograph, properties and care. Actual 3D specimen captures appear where available.

35 photographed materials · 247 named entries · 48 property references

Find a gemstone or material

35 photographed materials · Reference specimens, not sale inventory. Color is a browse aid, not an identification.

The directory includes minerals, varieties, organic materials and manufactured or assembled materials—not 247 distinct mineral species. Only the pictured entries have a selected photograph; other entries remain available in the name index.

Browse the 15 identification guides

Reference values are not a diagnosis. RI alone cannot establish identity, natural versus laboratory-grown origin, treatment, locality or value. Instrument limits and sample condition matter. This independent NumisTrends resource is not affiliated with or accredited by GIA, Gem-A or the museums cited.

Real specimens. A closer look.

Enlarge each museum photograph to inspect the visible details. These photographs are educational references, not sale inventory.

Sapphire is more than blue.

Ten faceted sapphires in varied colors from the Smithsonian National Gem Collection — Faceted sapphires showing color variation. Reference photograph; not NumisTrends inventory.
Chip Clark / Smithsonian · CC0 · Source ↗

Look at the pattern, not just the green.

Two polished trapiche emeralds with green segments and dark radial patterns, Smithsonian specimens G9127 and G9120 — Two trapiche emeralds, NMNH G9127 and G9120. Reference specimens; not offered for sale.
Chip Clark / Smithsonian · CC0 · Source ↗

Before the cut: ruby in marble.

Pink-red ruby crystal set in pale marble, Smithsonian specimen NMNH 176171 — Ruby crystal in marble, NMNH 176171. An uncut reference specimen, not a faceted gemstone offered by NumisTrends.
Ken Larsen / Smithsonian · CC0 · Source ↗

ACTUAL 3D SPECIMENS

Turn the mineral. See its form.

These are three-dimensional teaching specimens from the Paleontological Research Institution—not spinning photographs or models of the faceted gems above.

Fluorite

Paleontological Research Institution / Digital Atlas of Ancient Life. CC0 1.0. License · Open source model ↗

Calcite (blue)

Model by Emily Hauf. Paleontological Research Institution / Digital Atlas of Ancient Life. CC0 1.0. License · Open source model ↗

Aragonite

Model by Emily Hauf. Paleontological Research Institution / Digital Atlas of Ancient Life. CC0 1.0. License · Open source model ↗

Models illustrate surface shape, not laboratory measurements of color, clarity, treatment or optical performance. Educational references only; no sale inventory is implied.

Educational galleryLearn what to compareClear availabilitySpecific stones are labeled when offeredDetails matterReports, treatments, and measurements

KNOW WHAT TO COMPARE

What matters for
each gemstone.

Compare color, cut, clarity, treatment, origin claims, and documentation for each stone.

Diamond

Cut performance, carat weight, color, clarity, proportions, fluorescence, and laboratory documentation.

Compare the important details

Emerald

Compare emerald color, transparency, disclosed treatments, fissures, durability, and any origin report.

Compare the important details

Sapphire

Compare sapphire hue, tone, saturation, color zoning, heat treatment, cut, origin evidence, and appearance in different light.

Compare the important details

Ruby

Compare ruby color, transparency, treatments, fluorescence, origin evidence, and laboratory wording.

Compare the important details

BEFORE YOU COMPARE

Check treatments and
laboratory reports.

Our treatment and laboratory-report guide explains the terms you may see in a listing. The Trust Center covers NumisTrends disclosures, privacy, and marketplace links.

Read the gemstone treatment guide Open the Trust Center

OPTIONAL · ONE-MINUTE CHECK

Put that idea to work.

Can a beautiful photograph prove a gemstone is untreated?

No score, no penalty. Use the explanation and try again.

A BETTER COMPARISON

Compare the stone
and its documentation.

01IdentifyConfirm the stone type, variety, weight, dimensions, cut, and stated origin.
02Check disclosuresLook for treatments, laboratory reports, known repairs, and limits in the available information.
03CompareUse similar stones with similar qualities instead of broad averages or a single asking price.
04Review the offerLook for clear images, readable reports, return terms, and a price tied to the specific stone.

GEMSTONE REQUEST

Tell us what you want to find.

Share the stone, budget, timing, and preferred qualities. We’ll reply with matching availability or any details we need.

Diamond

Ruby

Emerald

Sapphire

Peridot

Opal

Spinel

Amethyst

Topaz

Zircon

Morganite

Tourmaline

Spessartine

Almandine

Pyrope

Grossular

Andradite

Jadeite jade

Nephrite jade

Pearl

Amber

Turquoise

Lapis lazuli

Coral

Malachite

Fluorite

Tanzanite

Chrysoberyl

Alexandrite

Kunzite

Moonstone

Sunstone

Cordierite

Scapolite

Aquamarine

Real specimens. A closer look.

Sapphire is more than blue.

Look at the pattern, not just the green.

Before the cut: ruby in marble.

Fluorite

Calcite (blue)

Aragonite

Diamond

Emerald

Sapphire

Ruby

Check treatments andlaboratory reports.

Put that idea to work.

Compare the stoneand its documentation.

Tell us what you want to find.

Check treatments and
laboratory reports.

Compare the stone
and its documentation.