Gem Lab Services

We operate an independent gemological laboratory serving private clients and the jewelry trade with professional testing and analysis.

Gemstone & Diamond Identification

We use all appropriate in-house testing procedures to determine gemstone identity, including:

  • Identification of gem species and variety
    (e.g., Corundum – Sapphire or Ruby; Beryl – Emerald, etc.)

  • Detection of natural, synthetic, lab-grown, and man-made gemstones

  • Testing of loose stones and some mounted stones
    (mountings may limit available testing)

Identification services are available as:

  • Verbal identification (often while you wait), or

  • Written Gem ID report (PDF) at an additional fee

Gem Identification reports do not include opinions of value.
We do not identify rocks, minerals, or uncut rough material.

Color Grading

Gemstone color is graded and documented using recognized systems, including:

  • GemDialogue

  • World of Color

Color grades are recorded in a reproducible format for future reference when the gemstone is not present.

Quality Analysis (Non-Valuation)

Quality Analysis reports begin with Gem ID and expand to include:

  • Cut, color, clarity, and estimated carat weight

  • Assessment of overall quality characteristics

  • Evaluation of metal content and general craftsmanship of mountings

Typical uses include:

  • Verifying seller claims

  • Pre-sale analysis when value information is not required

Optional services:

  • Diamond inclusion plotting (additional fee)

  • These reports do not include value conclusions.
    Stones are never removed from settings unless specifically requested and authorized.

Treatment Detection – Professional Opinion

Loose (and some mounted) gemstones are examined for indications of enhancement, including:

  • Heat treatment

  • Oil or polymer fillers

  • Irradiation

  • Coatings and dyes

Opinions are based on observable characteristics and current gemological data.

Country of Origin – Professional Opinion

Loose gemstones may be examined for characteristics that could indicate geographic origin.

Origin and treatment determinations are professional opinions, not guarantees.
We often recommend this service as a preliminary step before submission to major laboratories such as GIA or AGL.

Damage Reports

Damage reports document the type and extent of damage to diamonds, gemstones, watches, or jewelry, including:

  • Wear-related damage (e.g., facet abrasion)

  • Accidental damage (e.g., fractured stones, broken crystals)

  • Photomicrographs when appropriate

Damage reports:

  • Do not include value opinions

  • May be incorporated into a post-loss appraisal if value is later required

  • Are commonly used for insurance claim evaluation

Limitations & Referrals

Some identifications, treatments, or origin determinations require specialized equipment beyond our laboratory capabilities. When appropriate, we will advise whether referral to an advanced testing laboratory is warranted so you can decide whether the expense is justified.

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