All Diamonds

Natural Diamonds (melee in bracelet setting) (Round Brilliant)

Not a diamond; costume jewelry piece featuring imitation crystals or glass stones. (Mixed (Round, Melee))

Not a diamond; the image shows a gemstone tennis bracelet featuring red-colored gemstones, likely garnets or rubies, set...

Cubic Zirconia / Marcasite jewelry piece (Oval Brilliant)

Natural (accent stones), likely combined with natural sapphires or dark gemstones (Round Brilliant (accent melee) / Oval...

Natural Diamond (estimated based on the vintage style setting) (Round Brilliant)

Cubic Zirconia / Rhinestones (Round Brilliant)

Natural Diamond (Simulant or Lab-grown cannot be ruled out without microscopic testing) (Round Brilliant)

Natural Diamond (Assumed based on typical jewelry, though testing required for final verification) (Marquise or Emerald ...

Simulant / Cubic Zirconia or Fashion-grade Diamonds (Round (Melee / Small Accent))

Cubic Zirconia / Glass / Costume Jewelry Rhinestones (Mixed (Round Brilliant and Baguette/Step Cut cluster))

Cubic Zirconia or Glass Imitation (Costume Jewelry) (Round Brilliant (Cluster setting))

Natural Diamond (pavé set melee) (Round Brilliant (Melee))

The central and accent stones appear to be a mix of small, likely rose-cut or old-mine cut vintage diamond melee alongsi...

Not a diamond; the image shows vintage costume jewelry featuring paste glass stones, rhinestones, and faux pearls set in...

Cubic Zirconia / Glass Simulants (Round (accent stones))

Cubic Zirconia / Simulated Diamonds (Round Brilliant (accent stones))

Natural Diamond (melee/prominent vintage accent stones) (Round Brilliant (pavé/channel set within cross motif))

The central gem and surrounding pearls are the dominant elements, but there are accent melee diamonds integrated into th...

Cubic Zirconia or Glass (Costume Jewelry) (Mixed (Round Brilliant and Baguette))

Cubic Zirconia (Baguette and Round)

Natural Diamond (or potentially Diamond Simulants given mounting context, assuming fine jewelry standard) (Baguette Cut)

The center stone appears to be a colored gemstone, likely a synthetic ruby or red spinel, rather than a natural colored ...

Cubic Zirconia / Fashion Jewelry Stones (Round Brilliant)

Cubic Zirconia (Round)

Cubic Zirconia / Fashion Watch Crystals (Round (Melee))

Not Applicable (Not Applicable)

Cubic Zirconia or Fashion Simulant (Round)

Natural Diamond (Pavé set melee diamonds) (Round Brilliant)

Not a diamond; this is a vintage brooch featuring purple glass or amethyst gemstones set in brass or base metal. (Emeral...

Not a diamond; this item appears to be a cabochon-cut colored gemstone, likely lapis lazuli or blue sapphire, set in a g...

Not a diamond; the jewelry piece features pearls and colored gemstones (sapphires or similar) set in a multi-stone ring....

Not a diamond; this gemstone appears to be a blue sapphire or a synthetic blue spinel set in a ring. (Cushion / Rectangu...

Not a diamond; this gemstone appears to be a natural or synthetic blue sapphire or spinel set in a yellow gold ring. (Cu...

Not a diamond; likely a colored gemstone such as pink sapphire, tourmaline, or synthetic spinel set in a yellow gold rin...

Natural Diamond (accent stones) with a Central Colored Gemstone (Round Brilliant (accents) and Oval (central stone))

Not a diamond; the central gemstone appears to be a green-colored stone (potentially emerald or glass/synthetic spinel) ...

Natural Diamond Accent Melee (Round Brilliant)

Cubic Zirconia or Synthetic Simulant (Round Brilliant)

Natural Fancy Colored Diamond (or potentially Chrysoberyl/Yellow Sapphire based on visual appearance) (Emerald Cut)

Not a diamond; these are coated or treated glass rhinestones (commonly known as Aurora Borealis or AB crystals) set in v...

Not a diamond; this specimen appears to be a mineral aggregate or metallic ore matrix, possibly containing pyrite or gol...