Certificates
What Is a Gemstone Origin Report and How Reliable Is It?
How laboratories form geographic origin opinions for gemstones, why the conclusion is an opinion rather than a certainty, and what origin adds to value.
2 min read
Certificates & Laboratories
How gem certificates work, how to read a laboratory report, the difference between identification, origin and treatment reports, and when to seek a second opinion.
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Certificates
Gem Testing in Sri Lanka: NGJA and Private Laboratories
How gem testing works in Sri Lanka, who offers testing, how to judge a laboratory's credentials, and when a purchase justifies an international laboratory.
2 min read
Certificates
What Are Gem Certificates and What Do They Actually Tell You?
An overview of gemstone laboratory reports, what identification, origin and treatment documents cover, what they cannot guarantee, and why they matter.
3 min read
Certificates
When Should You Get a Second Laboratory Opinion on a Gemstone?
When a second gem laboratory opinion is worth the cost, high-value stones, origin premiums, no-heat claims, conflicting documents and doubts about a report.
2 min read
Certificates
How Can You Spot a Fake or Altered Gem Certificate?
Warning signs of fake or altered gem reports, mismatched weights, edited dates, photocopies in place of originals, and sellers resisting laboratory checks.
3 min read
Certificates
Which International Gem Laboratories Do Buyers Rely On?
An introduction to internationally known gem laboratories such as GIA, SSEF, Gübelin, Lotus and GRS, what they do, why their reports travel, and how to choose.
2 min read
Certificates
How Do You Verify That a Laboratory Report Is Genuine?
How to check a gem laboratory report using online report-number lookup, document security features and a physical comparison between the stone and the paper.
3 min read
Certificates
What Is Hallmarking and What Do the Marks on Gold Mean?
How hallmarking attests to precious-metal fineness, what common marks mean, why practice differs between countries, and what to check when buying in Sri Lanka.
2 min read
Certificates
What Is an Assay Report and When Do You Need One?
How assaying establishes the precious-metal content of gold and silver, what an assay report states, and how it relates to hallmarks and fineness marks.
2 min read
Certificates
What Is a Jewellery Valuation and What Is It Actually For?
What a jewellery valuation covers, how it differs from a laboratory identification report, and why insurance replacement value is not the same as resale value.
2 min read
Certificates
What Does a Gem Identification Report Actually Determine?
What a gem identification report establishes, species, variety, natural or synthetic status and detected treatments, and why it is the baseline document.
2 min read
Certificates
How Do You Read a Gem Report, Field by Field?
A field-by-field walkthrough of a generic laboratory report, report number, species, variety, weight, measurements, colour, treatment comments and origin.
3 min read
