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

Treatment	Visual	Instrumental	Status
Heat (Corundum) Ruby, Sapphire	Silk dissolution, rounded inclusions, colour zoning changes, stress fractures	Microscopy (inclusion changes), spectroscopy (Fe³⁺ peaks)	Permanent
Beryllium Diffusion Sapphire (orange padparadscha)	Colour concentration at facet junctions, uneven colour	EDXRF (beryllium detection), FTIR, UV-Vis	Permanent
Fracture Filling (Glass) Ruby, Diamond	Flash effect, colour flashes in fissures, surface residue	Microscopy (gas bubbles, flow structures)	Temporary
Oiling (Emerald) Emerald	Oil in fissures (UV fluorescence), surface residue	UV lamp (yellow-green fluorescence), FTIR	Temporary
Irradiation + Heat Blue Topaz, Fancy Diamonds	Uniform colour, specific colour types (Swiss/London blue)	Spectroscopy (radiation-induced defects), colour centres	Permanent
Dyeing Jade, Chalcedony, Pearls	Colour in pores/fractures, unnatural colours, concentrations	Microscopy (dye concentrations), Chelsea filter, spectroscopy	Temporary
Coating Topaz (Mystic), Diamond	Wear at facet edges, scratches revealing base colour	Microscopy (edge chipping), spectroscopy	Temporary
Lattice Diffusion Sapphire (full colour)	Even colour distribution, possible surface concentration	EDXRF (Ti, Fe detection at surface), FTIR	Permanent
Clarity Enhancement (Diamonds) Diamond	Flash effect in fractures, laser drill holes	Microscopy (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

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

Select Cut & Gemstone

⚠️ 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: