All Diamonds

Non-diamond (Glass or Ice shard) (Irregular / Rough Shard)

Natural Rough Diamond (Rough / Uncut Elongated Crystal)

Simulated or Synthetic (Likely Cubic Zirconia) (Radiant Cut)

Likely Simulant (Cubic Zirconia or Yellow Quartz/Citrine) (Radiant cut center stone with pear-shaped side accents)

Natural Rough Diamond (Rough/Uncut (Macle or irregular fragment))

Natural Rough Crystal Segment (Uncut / Roughly Crystalline)

Indeterminate (Likely non-diamond silicate mineral like Quartz or a rough glass fragment) (Rough / Uncut (Irregular shar...

Natural Rough Crystal (Mineral Specimen) (Natural Elongated Hexagonal/Prismatic (Uncut))

Non-diamond (Glass fragment) (Irregular/Rough fragment)

Natural Rough Crystal (Likely Quartz or Topaz, limited visual evidence of Diamond) (Rough/Uncut)

Natural Rough Crystal (Likely Quartz or Topaz, not Diamond) (Uncut Rough / Irregular Macle-like shape)

Rough Crystal (Uncut Diamond or Mineral Specimen) (Rough Macle or Distorted Octahedron)

Natural (Fancy Deep Blue) (Rough / Uncut Crystal)

Natural Fancy Color Diamond (Likely Type IIb) (Rough / Uncut Crystal (Octahedral habit appearing))

Non-diamond mineral (Likely Lapis Lazuli, Azurite, or Blue Slag glass) (Rough / Uncut)

Indeterminate Blue Gemstone / Mineral (Rough / Uncut)

Synthetic Carbon/Non-Diamond Material (Indeterminate Rough Crystal)

N/A - Image does not contain a diamond (N/A)

Moissanite (Oval Brilliant)

Moissanite (Simulant) (Oval Brilliant)

Moissanite (Potential) (Oval Brilliant)

Natural Diamonds (Round Brilliant (Multiple small stones set in a cluster))

Non-Diamond / Impurity Mineral (Likely Lapis Lazuli or Azurite based on color and texture) (Rough / Uncut)

Not a diamond; tentatively identified as blue slag glass or industrial waste containing metallic inclusions. (Rough, irr...

Natural (Fancy Color) - Preliminary visual suggests a rare blue diamond or sapphire; the crystal structure shown is a ro...

Likely Non-Diamond (Mineral Specimen) (Rough / Uncut (Natural Crystal))

Non-diamond/Mineral Specimen (Likely Azurite or Lapis Lazuli in Matrix) (Rough/Uncut (Natural crystal form))

The specimen appears to be a mineral crystal, likely Linarite or Azurite on a matrix, rather than a diamond. It lacks th...

Indeterminate / Most likely not a diamond (Rough / Uncut / Irregular)

Natural Diamond Composite (Oval Halo (Composite Centre))

Natural Diamonds (Cluster/Composite) (Oval Composite (Multi-stone Cluster))

Natural (Cluster) (Round Brilliant cut stones in an Oval cluster setting)

Natural Diamond Composite (Oval Halo (Composite Center))

Natural (likely melee/composite cluster) (Oval (Composite Shape) / Round Brilliant (Individual Stones))

Natural Diamonds (Cluster Setting) (Composite Oval (comprised of multiple Round Brilliant cuts))

The specimen in the image is not a diamond; it appears to be a natural mineral specimen, likely Linarite or Azurite embe...

None (Rough Blue Crystal/Likely Glass or non-diamond mineral) (Rough / Uncut)

Natural Raw Specimen (Likely Linarite or Azurite, not a Diamond) (Rough / Uncut / Natural Crystal Habit)

Natural Fancy Vivid Blue (Raw Crystal/Rough) (Rough/Uncut Crystal (Occurring as a Macle or Octahedral fragment))

Natural (Fancy Deep Blue) (Rough / Uncut Crystal (Octahedral fragment))

Non-Diamond (Likely Slag Glass or Cobalt Glass) (Rough / Uncut (Amorphous Shard))

Natural Rough Crystal (Potential Lapis Lazuli or Azurite, non-diamond) (Rough / Uncut (Natural octahedron or rhombohedra...