All Diamonds

Not a diamond; this is a mineral specimen, specifically an agate or chalcedony nodule slice (quartz variety). (Freeform ...

Natural (accent diamonds on the ring shoulders), central gemstone appears to be a purple stone such as amethyst or tourm...

Natural Diamond (or potentially a blue-tinted gemstone/aquamarine depending on material, assuming diamond for prompt foc...

Natural (Cushion)

Natural (Round Brilliant)

Natural Diamond (accent stones in a multi-gem piece) (Round Brilliant)

Moissanite (Round Brilliant)

Not a diamond; the central gem is a cultured pearl (likely golden South Sea or Tahitian dyed/treated), surrounded by sma...

Natural Diamond (with Marcasite accents) (Square / Princess cut center with round melee accents)

Natural diamond (pavé set melee) (Round Brilliant (melee))

Natural Diamond (Channel Set Band) (Princess / Square Mixed Cut)

Cubic Zirconia or Fashion Jewelry Stone (Pear)

Cubic Zirconia or Glass Simulant (Round Brilliant)

Natural Diamond (Round Brilliant)

Natural Diamond (Marquise)

Natural Diamond (Channel Set Multi-Stone Ring) (Round Brilliant)

Natural Diamond (Round Brilliant)

Natural Diamond (Round Brilliant)

Natural Diamond (Assessed visually in a multi-stone vintage ring setting) (Round Brilliant)

Natural diamond (Round Brilliant)

Natural or Lab-Grown Diamond (requires microscopic testing for definitive distinction) (Oval Brilliant)

Natural or Lab-Grown Diamond (Oval Brilliant)

Natural Diamond (Oval Brilliant)

Natural Diamond (Oval Brilliant)

Unable to determine definitely from the provided image due to poor lighting and focus, possibly synthetic or non-diamond...

Natural Diamond (Marquise)

Natural (Marquise)

Natural diamond in rough, uncut crystal form (Rough crystal / Natural octahedron or irregular rough form)

Natural rough diamond crystal (Rough octahedral/irregular crystalline form, unpolished)

Natural rough mineral crystal aggregate, likely quartz or calcite rather than gemstone diamond due to crystalline habit ...

Not a diamond (Raw rock/mineral matrix) (Not applicable)

Not a diamond; this image depicts an aggregate of small, crystalline mineral formations, likely quartz druzy or a simila...

Not Applicable - The image shows a cluster of unpolished quartz crystals within a geode or mineral matrix, not gem-grade...

Not a diamond; the image shows mineral formations or rock matrix, possibly containing sulfur or weathered rock, but defi...

Not a diamond (appears to be a peridot or green tourmaline beaded bracelet) (Spherical bead)

Not a diamond; this image displays a textured, glittery, or metallic reddish surface resembling painted stucco or a synt...

Not a diamond (appears to be raw matrix rock or kimberlite host rock with no cut diamond visible) (Rough / Uncut / Matri...

Not a diamond; this image displays rough mineral crystal clusters, likely quartz or calcite forming in a matrix rock for...

Unknown / Uncut Mineral Crystal (Likely Quartz or Salt, requires physical testing) (Irregular / Rough Crystal Fragment)

The image shows a delicate jewelry piece featuring very small accent diamonds or diamond simulants on a red string brace...

Natural or Lab-Grown Diamond (requires testing to distinguish) (Round Brilliant)

Cubic Zirconia (implied by S925 sterling silver stamp and common fashion jewelry indicators) (Round Brilliant)