Looking back on the last five or six years could cause someone in our industry to react in a number of ways, perhaps several simultaneously! The sweeping changes and rate of technological development over the last half-decade or so can only be described as astounding.
For more than two decades, I was a practitioner of the Japanese martial art of Aikido. The style I practiced was focused primarily on the purely defensive and harmonious blending of the ‘attack’ and ‘response’ energies. Most of the appraisers I know also practice some form of self-defence, at least in their appraisals.
In a previous issue of Jewellery Business, I introduced readers to a few of my favourite tools and briefly described some of their uses. Perhaps it’s a good time to provide a bit more detail and delve into specific techniques and how the information they provide can help us do our jobs more efficiently.
Provenance—as defined as the association of an item to a renowned designer, maker, or even a famous owner—can have a significant influence on value”¦ sometimes.
The vivid yellow of this diamond is only in your mind…literally. Colours are a significant part of our experience as humans and a huge part of what we do as professional gemmologists and appraisers.
Every professional has tools and techniques they consider indispensable to their trade. The world of gemmology and jewellery appraisal is somewhat unique in that many of us are left to figure these out for ourselves.
Unfortunately, diamond grading is one of those experiences in which we may be hindered by our assumptions. It may be that some of those presumptions are made on an almost subconscious level.
How often have you had a client carefully explain the ring they just bought has a Burmese ruby, or a Colombian emerald, Paraiba tourmaline, or Russian alexandrite?
In the previous column, we looked at how tiny errors can add up to significant problems when dealing with many small stones. This time, we’ll look at the calculations and adjustments that might be necessary when examining diamond centre stones.
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
Cookie
Duration
Description
cookielawinfo-checkbox-advertisement
1 year
Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category .
cookielawinfo-checkbox-analytics
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional
11 months
The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
CookieLawInfoConsent
1 year
Records the default button state of the corresponding category & the status of CCPA. It works only in coordination with the primary cookie.
viewed_cookie_policy
11 months
The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Cookie
Duration
Description
__cf_bm
30 minutes
This cookie, set by Cloudflare, is used to support Cloudflare Bot Management.
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
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.
Cookie
Duration
Description
__gads
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.
_ga
2 years
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.
_gat
1 minute
This cookie is installed by Google Universal Analytics to restrain request rate and thus limit the collection of data on high traffic sites.
_gat_UA-
1 minute
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.
_gid
1 day
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.
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Cookie
Duration
Description
ADV_u_id
3 months 8 days
Unique customer identifier used to track unique ad views and interactions with some ads.
GoogleAdServingTest
session
Tracks ads seen by the visitor through Google Ad Manager.
IDE
1 year 24 days
Google DoubleClick IDE cookies are used to store information about how the user uses the website to present them with relevant ads and according to the user profile.
loc
never
AddThis sets this geolocation cookie to help understand the location of users who share the information.
