http://www.youtube.com/watch?v=9rZzprhjYtA In this post, I decided to do a video tutorial explaining how I will go about determining the value of a blue sapphire. The method I use to determine the value of a particular sapphire (or any gemstone) is by first categorizing the stone based on 4Cs + OT method, which are the six … Continue reading How to Determine a Value of Blue Sapphire? Based on 4Cs plus OT – A Buying Guide [Video]
Synthetic diamonds is one topic which is not going away from the news or diamond trade discussion for the last few months. Since the big announcement in early June by De beers that they are creating their own synthetic diamond jewelry line and then the second big announcement by US Federation Trade Commission’s (FTC) decision … Continue reading What are synthetic diamonds (man-made diamonds) and will they affect natural diamond trade or value?
In our previous blog posts, we have discussed how the value of gemstones are affected by these six factors Color Carat Weight Clarity Cut Origin Treatment However, certain gemstones actually exhibit different phenomena effects like Adularescence Asterism Chatoyancy Iridescence Play of Color Color Change So, “How do these gemstones get these phenomena and how does … Continue reading How does ‘Phenomena Effects’ like Adularescence, Asterism, Chatoyancy, Iridescence, Play of Color, and Color Change affect the value of gemstones?
Opal is one of most popular phenomena gemstone as they display very unique characteristics like 'play-of-color' or different background fire colors. They are quite abundant but also rare as well depending on the quality grades. Each quality has different ‘price levels’ in the gemstone market which we will try to briefly explain below. Opal Classification … Continue reading Natural Opal buying guide – How to check and understand difference between different opals?
Gemfields has decided to tackle head on a big issue which has been plaguing the gem trade for a long time. How to guarantee the emerald you bought is ethically sourced? Through the partnership with Gübelin Gem Lab, they came up with a very creative solution by using Gübelin’s new “Provenance Proof” nanoparticle technology which proves … Continue reading It is now possible to buy ethically sourced Zambian emeralds through partnership of Gemfields and Gübelin Gem Lab using Nano-Particle Technology.
For the last few years, I have custom made quite a few diamond engagement rings for locals, tourists and expats in Bangkok and most often the first question I am asked is 'How should I choose a diamond ring?'. A perfectly relevant question it is, coming from someone who has no knowledge or experience in buying … Continue reading How would I choose a diamond ring? – GIA Graduate Gemologist Opinion
Buying a high quality ruby, sapphire or emerald isn’t cheap, but how do you know the beautiful expensive gemstone you are buying is the quality you are expecting? As I have discussed in our previous blog posts, it is very important to evaluate color gemstones value base on ‘six dimensional’ criteria – origin, color, carat … Continue reading What lab or certification is the best for checking your expensive ruby, sapphire or emerald?