What Are Diamond Certificates? Taking a Look At How Diamonds are Documented Today.

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When jewelry stores, gemstone dealers, or even your friends talk about these documents, what do they mean exactly? Here's a little bit of knowledge for you to familiarize yourself with one of the gem trade's most commonly used terminologies.



The term diamond certificate commonly refers to a specific gemological report that illustrates and defines the species, variety, grading and characteristics of a particular stone. For diamonds, laboratories like Gemcamp employ graduate gemologists from some of the world's top gemological schools, in order to properly identify and evaluate a stone. This is important because aside from influencing the monetary value equivalent of a diamond, gemological report grades also help you identify your stone and separate it from others.

Diamond reports contain particular information sections like the exact carat weight of a stone, down to one or two decimal places. A carat is one fifth of a gram, so this measurement is precise enough to serve as a good means for ID'ing your diamond. In light of frequent reports about jewelry theft, especially in Metro Manila, it always helps to have anything that can add more support to the identification of your property. Gemological reports can also describe and plot the specific 'inclusions' and blemishes' on a diamond, which are sort of like its fingerprints in terms of uniqueness. Many diamonds can be matched to their reports simply by checking the plot drawing against their actual appearance under a 10x loupe or microscope.



A diamond certificate or report, serves as a gemstone's ID card, to help buyers, sellers and jewelry owners to gain assurance and security against possible item fraud.


Laboratories must be properly equipped with the right instrumentation to properly identify and grade stones. Diamonds are compared against calibrated 'master stones' to determine a color grade. Likewise, only an experienced gemologist who has seen several hundred stones can efficiently determine grades for clarity and cut.

Note that there is a distinct difference in gemological reports issued by professional laboratories versus fancy-clad certificates that come free with the purchase of a jewelry item from a store. Laboratories conduct thorough testing without any motivational gain from the type of results that are given, making them immune to bias and completely objective. They do not sell you gemstones or try to convince you to buy something from their owners. Everything is about honest and open disclosure, for the client's knowledge and benefit only.



Software and instrumentation that measures reactions to photoluminescence are also needed to separate natural diamonds from man-made or 'cultured' diamonds, which are atomically same, but grown artificially in a lab. Man-made diamonds, despite their chemistry, do not possess the same value as natural diamonds. As of 2017, man-made diamonds produced by chemical vapor deposition sell for about 40% of a natural diamond's value (assuming the same grades). This data was taken from international jewelry trade fairs by the Gemcamp laboratory's gemological research team.

If you want to be certain about your gemstone's identity and value, find a reputable gemology lab and schedule a visit. Having reports made for your gemstones also gives them a 'report card', with grades similar to the ones we used to receive in school. This document can help you sell or liquidate your stones by providing clients with an essential third-party documentation of your item, dismissing bias and promoting a fair and ethical transaction. Gemcamp laboratories serves the Philippine public as one of the most modern laboratory facilities that helps people identify, grade and document their jewelry possessions today.

Note that diamond certificates and gemological reports are products of private institutions subject to limitations and restrictions. Each laboratory or institution may abide by a different set of policies and requirements.

Gemcamp Laboratories

A Discovery Institute for Gemstones and Gemology

Our resident gemologists believe in encouraging public trust within the jewellery industry through shared education, value transparency and professionalism.

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