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Professional Appraisal of Diamonds, Gemstones, Watches and Fine Jewelry

Patrick Davis is an independent jewelry appraiser serving clients in Los Angeles, Hollywood, Santa Monica, Long Beach, Hollywood, Beverly Hills, Malibu, Culver City, San Bernardino, San Fernando Valley and the Inland Empire from his offices in Los Angeles, California.  Mr. Davis has over 15 years of jewelry appraisal experience.  He is a Graduate Gemologist (GG), an Accredited Senior Appraiser (ASA) and a Master Gemologist Appraiser®.

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Call Now: 310.821.1453
_________________________________________________
  • Diamond Proportion analyzer                                
  • Electronic Gem Scale                                        
  • Electronic metal scale                                        
  • Dichroscope                                                
  • Polaroid filter lenses for microscope                        
  • Refractometer                                                    
  • Diamond grading light                                         
  • 10X hand loupe                                                 
  • Master comparison set                                       
  • Polariscope
  • GIA Proportion Scope
  • Ideal Scope
  • Hearts & Arrow Scope                                                       
Call to make an appointment today!
(310) 821-1453
  • Heavy liquids
  • Fiber optic light source
  • Chelsea Filter
  • Millimeter micrometer
  • Presidium Electronic Gemstone Gauge
  • Presidium Gem Weight computer
  • Immersion cell
  • GIA GEM Spectroscope
  • G-1 Electronic Gold Tester and acids
  • Ultra-violet light (long and short wave)
  • Leverage Gauge and Tables
The Evaluation Process:

To learn more about how diamonds
are graded Click here
:

Diamond Grading:

All diamonds over half a carat will be issued a diamond grading report.

Clarity:  - The internal characteristic or inclusions will be observed under a high powered gemological microscope and a plot diagram will show
the location and type of inclusion.  A clarity grade using the GIA clarity grading system will be assigned and noted in the report.

Color analysis: The amount of inherent color in your diamond will be evaluated and compared to GIA master graded diamonds under proper
daylight diamond grading lamps.  A letter grade for your color type using the GIA color grading system will be assigned and noted in the report.  I
have a full set of master graded diamonds for comparison, graded and certified by the Gemological Institute of America (GIA).

Carat Weight: If your diamond is mounted, the carat weight is estimated by using a standard formula for the type of cut for your stone.  If your
stone un-mounted, it is directly weighed on a digital carat weight scale.  The weight is noted in the report.

Cutting Proportions: The cutting proportions of your diamond are evaluated.  This includes, measurements of the diameter or length & width,
along with the depth of your diamond.   Depth%, Table%, Crown Angle, and Girdle Thickness are evaluated and noted in the final report.

Finish:  Symmetry and Polish will be assessed and given a grade of Poor to Excellent and noted in the report.

Cut Grade:  A cutting class is assigned based on the stones cutting proportions and is noted in the report.

Fluorescence:  Your diamond will be tested for a reaction to long wave and short wave ultra violet light.  The findings will be noted in the report.

Enhancements:  Any and all enhancements that are detectable by gemological testing will be noted in the report.


Colored Stone Grading:

All colored stones over one carat will be issued a colored stone grading report.

Hue (color): The color of your stone is compared to a GIA master color comparison set to determine the stones color or hue and noted in the
report.

Saturation of Color: The saturation of color inherent throughout the stone is evaluated and noted.

Tone: The degree of lightness or darkness of the color of the stone is evaluated and noted.

Carat Weight: If your stone is mounted, the carat weight is estimated by using a standard formula for the variety and cut type of your stone.  If
your stone un-mounted, it is directly weighed on a digital carat weight scale.  The weight is noted in the report.

Cutting Proportions:  Depth%, Table%, Girdle thickness are evaluated and noted.

Cut Grade: The cutting class based on the stones cutting proportions is evaluated and noted in the report.

Clarity Type: The clarity type is noted for your variety of colored stone.

Clarity: A clarity grade is assigned that is appropriate for the clarity type for your stone and noted in the report.

Finish: Symmetry and Polish will be observed and given a grade of Poor to Excellent and noted in the report.

Enhancements:  Any and all enhancements that are detectable by gemological testing will be noted in the report.


Mounting Attributes:

A complete evaluation of the mounting is done and is described in detail in the final report.

Each piece of jewelry will be weighed, measured and described in detail.

Inscriptions, hallmarks, karat stamping's, signatures and any other identifying markings are noted.

A metallurgic analysis is done on all metals to verify type and fineness and noted in the report.

Any additional diamond accents or colored stones are evaluated for clarity and color and carat weight and
are estimated using the appropriate formulas.  The findings are noted in the report.

Custom design and hand fabricated work, along with signed pieces are noted and taken into account in the final value conclusion.


The Final Hard Copy Appraisal Report:

All the quality analysis information listed above is conveyed in a clear and easy to understand format in the final appraisal report.

Digital Photographs of all jewelry items are taken and included in the appraisal document.

Your appraisal report will explain the grading system used.

An explanation and the definition of value used will be included, along with the instructions for the appropriate use of the appraisal report.

The appraisers certification of practice is included and the report is signed by the appraiser.

Your appraisal will be prepared in conformity with the Uniform Standards of Appraisal Practice, USPAP.

The final appraisal report is a folded booklet that comes in a protective vinyl pouch with one extra copy.
List of Gemological Instruments available at GemSecure:
The 4 C's of Diamonds
The Appraisal Process:
J e w e l r y  A p p r a i s a l s