Our Services

Litigation Support

Providing expert analysis and factual reports to aid legal proceedings involving gemstones and jewelry disputes.

Report Verification

Meticulously reviewing and authenticating existing gemological reports for accuracy and reliability.

New Purchase Valuation

Offering informed valuations for potential gem or jewelry acquisitions based on quality and market insights.

Diamond Grading

Precisely assessing diamond quality according to standardized criteria such as cut, color, clarity, and carat weight.

Stone Identification

Expertly identifying and evaluating gemstones, ensuring accurate determination of type, quality, and authenticity.



Years of
About Us

Unveiling Excellence: Welcome to GemVista - Where Every Gem Tells a Story

Hello, world! My name is Sandra Marcos and I am the founder of GemsVista. Today, I'm thrilled to unveil GemVista—a culmination of passion, expertise, and dedication. At GemVista, we don't just evaluate gems and jewelry; we craft narratives, unveil legacies, and ensure that each precious stone holds its rightful place in your story.

We're not just about assessments; we're about revelations—uncovering the unique tale behind every gem and providing meticulous appraisals that reflect their true worth. Our commitment to excellence resonates in every facet of our work, ensuring unparalleled accuracy and reliability.
With GemVista, you're not just getting a service; you're gaining access to a world where expertise meets integrity. It's my pleasure to invite you to experience the brilliance of GemVista—where every gem holds a story waiting to be told.


Awards Won


Completed Cases


Happy Clients


Why Choose Us

Unrivaled Expertise

Our team comprises seasoned gemologists and jewelry appraisers with years of industry expertise. We bring a wealth of knowledge, precision, and a deep understanding of gemological nuances to every assessment, ensuring accurate and reliable evaluations.

Integrity and Trust

At GemVista, integrity is the cornerstone of our work. We operate independently, providing unbiased assessments and transparent evaluations. Clients trust us for our commitment to honesty, accuracy, and ethical practices.

Comprehensive Services

From litigation support to new purchase valuations and diamond grading, GemVista offers a comprehensive suite of services. Whether you're seeking expert opinions for legal matters or seeking to understand the value of a newly acquired gem, we have the expertise to assist.

Client-Centric Approach:

We prioritize our clients' needs, offering personalized attention and tailored solutions. Our commitment to excellence extends beyond assessments; we strive to empower our clients with knowledge, ensuring they make informed decisions about their precious investments.


Customer Feedback

GemVista's meticulous appraisal helped me understand the true value of my heirloom jewelry. Their expertise and detailed assessment were invaluable in making informed decisions about my family's treasures.

Emily Parker
Client & Jewelry Enthusiast

I was impressed by GemVista's professionalism and thoroughness in their diamond grading service. Sandra and her team provided an insightful analysis that exceeded my expectations.

James Bennett
Customer & Diamond Collector

The report verification service at GemVista gave me peace of mind. They meticulously reviewed my existing appraisal, and their attention to detail was exceptional.

Sarah Johnson
Client & Gemstone Investor

GemVista's stone identification service was instrumental in confirming the authenticity of a gemstone I had acquired. Their expertise and accurate identification were impressive.

Michael Rodriguez
Customer & Gemstone Collector