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Digital Report - immediate delivery to your email.

Date of Publishing: June 2025.
No. of Pages: 125.

Contents:
1. Structures Behind the Spectacle: A Review of Optical Effects in Phenomenal
Gemstones and Their Underlying Nanotextures Shiyun Jin, Nathan D. Renfro, Aaron C. Palke, and James E. Shigley.

Provides a comprehensive summary of the special optical effects in gemstones, including
opalescence, chatoyancy, asterism, schiller, and iridescence, and investigates the submicron inclusions and nanotextures in each type of phenomenal stone.

2. Lab Notes
Unusual patterns in diamonds • Gold-plated gold • CVD-grown diamond with unusual
cause of greenish color • HPHT-processed natural and laboratory-grown diamonds with
counterfeit inscriptions • Three large natural hollow Pinctada radiata pearls • Imitation
seed pearl with blue X-ray fluorescence • Pezzottaite with multiple cat’s-eyes • Quartz
assemblage imitating emerald.

3. G&G Micro-World
Anatase “dandelion” in agate • Diamond within a diamond within a diamond
• “Goose bumps” on South Sea pearl • Iridescent pen shell • Colorless danburite crystals
in phenakite from Myanmar • Lithiophilite in quartz • Monazite in quartz • Mystery
pebbles in quartz • Rutile star in quartz • “Sugar plum” in titanium-diffused blue
sapphire • “Soap bubbles” in yellow sphene • Quarterly Crystal: Unique phantom in
diamond.

4. Colored Stones Unearthed
Describes the geology, mineralogy, and formation of granitic-composition pegmatites and
provides a summary of their worldwide occurrences.

5. Gem News International
Emeralds and beryl from Kazakhstan and Ukraine • Unique trapiche grossular from
China • GIA 7 Pearl Value Factors: An update on nacre classification • Exceptional nacre
thickness of hybrid akoya bead cultured pearls • Iridescent gems cut from hinge ligament
of South Sea pearl oyster • Neptunite inclusions in rare poudretteite • New väyrynenite
production from Nigeria • Multilayered labratory-grown diamond • Diamond trader
Ishaia Gol • Diffusion-induced blue spinel-like layer on natural sapphire.

6. In the Spotlight: Ben Kho: From Rough Beginnings to Brilliant Mastery Jennifer Stone-Sundberg.

Digital Report - immediate delivery to your email.

Date of Publishing: 2024.
No. of Pages: 25.

A cut grading system useful at all levels of the diamond trade must encompass the visual appeal of polished diamonds. This paper presents results from observations of oval-, pear-, and marquise-shaped diamonds for face up appearance and outline appeal. In a controlled environment, an international cross section of diamond buyers, sellers, cutters, and appraisers observed sets of research diamonds in each shape; internal observation 
teams also examined diamonds submitted to GIA for grading services. Observers consistently disliked diamonds with prominent windowing but showed a broader range of opinions regarding the “bow tie” and “crushed ice” patterns typically found in these rounded fancy shapes. The distribution of opinions indicates significant differences in both regional preferences and personal taste for certain outlines and appearance patterns. Virtual facet 
maps, calculated from the three-dimensional wireframe file of a polished diamond, provide a quantitative visualization of these patterns. The geometric complexity of fancy shapes with multiple faceting arrangements requires the use of those same 3D files for assessing or predicting light behavior in a polished diamond. 

-        Gemological Institute of America (GIA) Certification

Organizing processes on how to obtain a GIA Certificate.

The GIA report details the diamond's dimensions, clarity characteristics, color grade, cut grade, polish, symmetry, and any inscriptions.

-        Appraisals and Authentication

Orchestrating appraisals to assess the value of jewelry pieces or authenticate the origin and craftsmanship, especially for antique or high-value items.

-        Jewelry Art Market Expertise

Offering expertise on the value, history, and artistry of different pieces, helping clients make informed decisions about buying, selling, or collecting jewelry as art.

The cost of service is for a 30-min consultation.