Advanced Analysis

Advanced gemmological analysis tools including treatment detection reference, origin determination characteristics, and gemstone cut proportion analyzer.

Treatment Detection

Visual & instrumental indicators for common gem treatments

Common Treatment Types

Heat Treatment
Moderate

Colour improvement, inclusion dissolving

Fracture Filling
Easy

Clarity enhancement

Dyeing
Easy

Colour enhancement

Oiling/Resin
Moderate

Clarity enhancement (especially emerald)

Irradiation
Difficult

Colour change (blue topaz, coloured diamonds)

Diffusion
Moderate

Colour enhancement

Coating
Easy

Colour, iridescence, or protective layer

HPHT
Very Difficult

Colour improvement (diamonds, synthetic gems)

Detection Indicators

9 treatments
TreatmentVisualInstrumentalStatus

Heat (Corundum)

Ruby, Sapphire

Silk dissolution, rounded inclusions, colour zoning changes, stress fracturesMicroscopy (inclusion changes), spectroscopy (Fe³⁺ peaks)Permanent

Beryllium Diffusion

Sapphire (orange padparadscha)

Colour concentration at facet junctions, uneven colourEDXRF (beryllium detection), FTIR, UV-VisPermanent

Fracture Filling (Glass)

Ruby, Diamond

Flash effect, colour flashes in fissures, surface residueMicroscopy (gas bubbles, flow structures)Temporary

Oiling (Emerald)

Emerald

Oil in fissures (UV fluorescence), surface residueUV lamp (yellow-green fluorescence), FTIRTemporary

Irradiation + Heat

Blue Topaz, Fancy Diamonds

Uniform colour, specific colour types (Swiss/London blue)Spectroscopy (radiation-induced defects), colour centresPermanent

Dyeing

Jade, Chalcedony, Pearls

Colour in pores/fractures, unnatural colours, concentrationsMicroscopy (dye concentrations), Chelsea filter, spectroscopyTemporary

Coating

Topaz (Mystic), Diamond

Wear at facet edges, scratches revealing base colourMicroscopy (edge chipping), spectroscopyTemporary

Lattice Diffusion

Sapphire (full colour)

Even colour distribution, possible surface concentrationEDXRF (Ti, Fe detection at surface), FTIRPermanent

Clarity Enhancement (Diamonds)

Diamond

Flash effect in fractures, laser drill holesMicroscopy (drill holes, filler in fractures)Temporary
Disclosure:All treatments must be disclosed to buyers•Fracture filling & dyeing drastically reduce value•When in doubt, always disclose

Treatment Wizard

Pick the gem kind, tick observed clues, get ranked treatment likelihoods

Pick the gem kind, tick the clues you actually see under loupe, microscope, UV, or warming. The wizard weighs each clue and ranks treatments by likelihood. A negative score means the clue argues against that treatment.

Observed clues (0 ticked of 12)

Tick at least one clue above to see ranked treatments.
Note: this wizard reasons over visual & instrumental clues only. Some treatments (e.g. beryllium lattice diffusion, low-temperature heating of pastel sapphire) require advanced spectroscopy (LIBS / FTIR / UV-Vis) for definitive detection. Consult a recognised gem laboratory when stakes are high.

Proportion Analyzer

Evaluate cut quality from proportion measurements

Cut Grade Reference

Excellent
Premium pricing

Proportions within ideal range, maximum brilliance and fire

Market Impact: Premium pricing - 10-20% above average cut

Very Good
Slight premium

Proportions within acceptable range, excellent light performance

Market Impact: Slight premium - 5-10% above average cut

Good
Market average pricing

Proportions acceptable, good light return

Market Impact: Market average pricing

Fair
Discount

Proportions outside ideal, noticeable light leakage

Market Impact: Discount - 10-20% below average cut

Poor
Heavy discount

Severe proportion issues, significant windowing or extinction

Market Impact: Heavy discount - 30-50% below average cut

Proportion Analyzer

⚠️ Important Notes

  • • This is a simplified analysis - full cut grading requires symmetry, polish, and other factors
  • • Colored gemstones have wider acceptable ranges than diamonds
  • • Some cuts (antique cushions, Portuguese cuts) intentionally vary from modern standards
  • • Professional cut grading requires calibrated proportionscopes and gemological training

Origin Determination

Geographic origin determination requires comprehensive knowledge of inclusion suites, trace element chemistry, and regional characteristics. See our in-depth learn section: