Jewelry, gemstone, and watch appraisal

At diams.com, expertise is first and foremost a meeting between material, observation and experience.
It is based on in-depth knowledge of jewelry, diamonds, precious stones and watches, acquired over many years through direct contact with gemstones and the market itself.

Expertise carried out by a GIA Graduate Gemologist

Ramon Cortes, founder of diams.com, is a GIA Graduate Gemologist (Gemological Institute of America), the world’s leading authority in gemstone analysis and classification.

His career has been built over more than 35 years in the fields of jewellery, fine jewellery and watchmaking, guided by a constant focus on accurate evaluation, genuine understanding of materials and respect for their individuality.

Jewelry and objects we appraise

We provide expert appraisals for:
    •    Antique and contemporary jewelry
    •    Diamonds
    •    Colored gemstones
    •    Pearls
    •    Watches

Our collaboration with a recognized auction house allows us to continuously monitor market developments, trends and values, ensuring evaluations that reflect current market realities.

Types of expertise offered

Depending on your needs, several types of expertise can be provided.

Insurance appraisal
An evaluation intended to determine a replacement value, typically required for insurance purposes.

Resale appraisal
An assessment of market value, taking into account condition, quality and the current market context.

These services are available to both private clients and professionals, including insurers, notaries and legal professionals.

Rigor, methodology and traceability

All our expert appraisals are carried out by a GIA-certified gemologist, using recognized and documented methods, ensuring:
    •    rigorous analysis
    •    consistent valuation
    •    clear traceability

Each appraisal is based on objective criteria, combined with a careful reading of the unique characteristics of each piece.

At-home expertise

When travel is not possible, we offer a portable gemmological laboratory, allowing certain appraisals to be carried out directly at your home, under professional, discreet and appropriate conditions.