American Gemological Appraisals

Whittier, California, USA

Avg. Rating Rating star5.0 (1 review)

Jewelry Appraiser
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About this Appraiser

American Gemological Appraisals (AGA) is located within the QBC Jewelers building in Whittier and is owned and operated by Craig Sperling, RGA. Craig has over 43 years of professional appraisal experience in the jewelry and diamond trade. A same-day appraisal service is available from their NAJA Accredited Gem Lab in Whittier, without the need for an appointment. Your precious items are initially examined by the Gemologists and Appraisers, Craig Sperling or Guillermo Oliva, and the purpose and scope of your appraisal requirements are discussed and agreed before leaving your jewelry for a collection at a later time.

AGA also offers an on-site (home-visit) valuation service at your residence, office or law firm, throughout the Los Angeles area. Work can be carried out in your presence. This service is particularly appreciated by clients with very high value items or large collections, or customers who prefer the security and comfort of their own home.

Appraisal and valuation reports are provided for all types of fine jewelry, including antique, period and modern items of diamond and gem set jewelry. Assessments and valuations are also carried out on loose diamonds, colored gemstones, pearl items, coins and watches.
Appraisal documentation includes:

  • Insurance Replacement appraisals.
  • Fair Market Value reports.
  • Probate & Trusts documentation (Estate Tax etc).
  • Divorce & Dissolution Settlement appraisals.
  • Liquidation and Charitable Donation valuations.
  • Gem identification and grading.

Expert Witness & Dispute Resolution services are available along with AGA’s litigation support package. Consultations are also available for the verification of a purchase, and also damage reporting and post-loss assessments.

Whatever your needs, all reports are produced in compliance of standards and regulations laid down by USPAP (Uniform Standards of Professional Appraisal Practice) and the NAJA (National Association of Jewelry Appraisers).

AGA provides appraisal and gemological services to Consumers, Retailers, Manufactures, Wholesalers, Arbitrators & Law firms, Finance & Credit Card Companies. Please use the email and phone links at the top of the page to find out how AGA can assist you.


The Business

  • Private Practice & Trade Appraiser
  • Business mix: Appraiser
    Also: Expert Witness / Court work
  • Principal + 1 staff appraiser
  • Tue - Fri: 10am to 5pm
    Sat: 10am to 4pm
  • Home visits, via jewelers & at Appraiser′s office


  • Per-item & time-based fees
  • All major cards accepted
  • Full appraisal reports start at $180


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  • GDD, PS
  • CM, CMA, RGA
  • CSMP


  • GIA



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While you wait jewelry Appraisals


American Gemological Appraisals
7307 Greenleaf Avenue
CA 90602


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Reviews (1)
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All reviews have been verified. The Jewellery Appraiser has confirmed the validity of the report details provided by the Reviewer but did not see the Reviewers rating or review text during the validation process. This produces unbiased, reliable and genuine reviews.


avatarHeather Morgan. Whittier

Review starsAug 2021

Incomparable Knowledge and Excellent Customer Service

I found Craig on the National Association of Jewelry Appraisers and was listed as a Certified Master Appraiser. This is there highest rating so I didn't hesitate to make an appointment.

Being newly engaged and having received a beautiful ring I wanted to get it insured as well as understand the quality. As they began the process… measuring, checking the diamonds, magnifying, etc. I immediately knew I was in the right place. That belief was solidified after actually talking to Craig who took so much time explaining the process, his experience and how I could truly understand what I received in a ring. I could not have been more appreciative of his patience and willingness to spend an extensive amount of time with me. I can not rave enough about Craig, his expertise, his patience and his quality of service!

Expertise / Items Examined: Engagement ring.