All Diamonds

Likely Diamond Simulant (possibly Cubic Zirconia or Glass) (Poorly faceted Cushion or Radiant hybrid)

Moissanite / Simulant (Princess or Square Radiant Modified)

Synthetic Simulant (likely Moissanite or high-dispersion crystal due to rainbow flash) (Cushion Brilliant)

Rough Fancy Color Diamond (Rough Octahedral Fragment)

Likely Moissanite or High-Quality Diamond Simulant (Radiant Cut (Modified Square/Rectangular))

Moissanite (Simulant) (Square Radiant Cut)

Moissanite (Asscher Cut (Square Emerald Cut))

Moissanite (Simulant) (Radiant Cut (Rectangular Modified Brilliant))

Likely Simulated (Cubic Zirconia/Moissanite) (Radiant Cut)

Simulated/Cubic Zirconia (Cushion Modified Brilliant)

Likely Moissanite or High-Quality Diamond Simulant (Radiant / Modified Rectangular Brilliant)

Natural Diamond or Lab-Grown Diamond (requires testing to differentiate) (Radiant Cut (Rectangular Modified Brilliant))

Natural Diamond or Lab-Grown Diamond (Radiant Cut)

Likely Diamond (Natural or Lab-Grown) (Cushion Modified Brilliant)

Potential Diamond Simulant (e.g., Cubic Zirconia or Moissanite) (Cushion Modified Brilliant)

Likely Non-Diamond (Simulant/Glass) (Asscher/Square Emerald Cut)

Moissanite / High-Refractive Simulant (Cushion Cut)

Simulant (Likely Cubic Zirconia or Moissanite) (Radiant Cut)

Likely Diamond Simulant (Potential Cubic Zirconia or Moissanite) (Radiant or Modified Cushion Cut)

Likely Moissanite or Cubic Zirconia based on high dispersion/fire (Radiant Cut)

Likely Natural or Cubic Zirconia (Stimulant) (Round Melee)

Rough / Raw Natural Diamond (Rough Octahedral Fragment)

Natural Diamond (Radiant Cut)

Indeterminate due to image quality; likely Natural or Lab-Grown (Round Brilliant)

Possible Simulated Diamond (Cubic Zirconia or Moissanite) (Cushion or Radiant Hybrid Cut)

Simulant (likely Cubic Zirconia) (Round Brilliant)

Simulant (Cubic Zirconia/Moissanite) (Princess Cut (Square Modified Brilliant))

Likely Diamond Simulant (e.g., Cubic Zirconia or Moissanite) (Princess Cut (Square Modified Brilliant))

Likely Lab-Grown Diamond or High-Quality Moissanite (Radiant Cut (Elongated))

Indeterminate based on image, though visual dispersion suggests a potential stimulant like Cubic Zirconia or Moissanite ...

Likely Diamond Simulant (e.g., Cubic Zirconia) (Modified Cushion Cut)

Likely Diamond Simulant (e.g., Cubic Zirconia or Crystal) (Princess or Square Radiant Hybrid)

Natural Diamond (Radiant Cut)

Natural or Lab-Grown Diamond (Radiant or Cushion Hybrid (Modified Brilliant))

Likely Diamond (Natural or Lab-Grown) (Emerald Cut or Radiant Cut)

Likely Lab-Grown Diamond (CVD or HPHT), though Moissanite cannot be fully ruled out without thermal testing. (Radiant Cu...

Natural (Likely Diamond) (Radiant Cut)

Natural (Radiant Cut)

Natural Diamond (Likely Type Ia) (Cushion Modified Brilliant)

Natural or Lab-Grown Diamond (requires lab testing to differentiate) (Princess Cut (Modified Square Brilliant))

Potential Diamond Simulant (e.g., Cubic Zirconia or Moissanite) (Cushion Modified Brilliant)

Likely Simulated (Cubic Zirconia or High-Grade Stimulant) (Radiant Cut)