Over the last 90 years, some of the most prominent gemmologists and gemmological institutions have aimed to create scientific consistency. The principal goal of their endeavour has been to formalize a standardized, unbiased language to accurately describe diamonds and gemstones.
One in 10,000 natural diamonds has enough colour to be deemed a fancy-coloured stone. Browns are the most common, and some mines like Rio Tinto’s Argyle in Australia produce large quantities of these diamonds, which are marketed as ‘champagne’ in the lighter yellowish brown range and ‘cognac’ for the darker orangey brown variety.
Experience and keen perception are a must in the jewellery industry. Since the scale of the object is most often very small, this is a good place to start training the eyes to see things that can truly make a difference in value and price.
As an independent appraiser who neither buys nor sells diamonds, I often have to explain why my grades are substantially different from those provided by a client’s grading report from one of the many laboratories. Inevitably, the client wants to know how something like this can happen. Come to think of it, aren’t we all a bit curious?
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
1 year 24 days
The __gads cookie, set by Google, is stored under DoubleClick domain and tracks the number of times users see an advert, measures the success of the campaign and calculates its revenue. This cookie can only be read from the domain they are set on and will not track any data while browsing through other sites.
The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors.
This cookie is installed by Google Universal Analytics to restrain request rate and thus limit the collection of data on high traffic sites.
A variation of the _gat cookie set by Google Analytics and Google Tag Manager to allow website owners to track visitor behaviour and measure site performance. The pattern element in the name contains the unique identity number of the account or website it relates to.
Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously.