In a follow-up post to the beauty of unheated yet beautiful gemstones, though they are difficult to find, at Heritage Gems, it is possible.
Below are just some examples of fine quality unheated blue sapphires
4.68ct unheated medium blue sapphire
2.34ct unheated vivid blue sapphire
4.06ct unheated medium-deep blue unheated sapphire
5.92ct unheated medium-deep blue unheated sapphire
For fine quality sapphires under 3cts, prices can range anywhere from SGD4,000 – SGD5,900 per carat. 3-5cts, prices range from SGD6,000 – SGD7,900 per carat. For sizes above 5cts, prices start from SGD8,000 per carat. These are current prices as of September 2013.
In-house criteria for fine quality blue sapphires:
- consistent colour throughout gemstone (no colour zoning, colour shades)
- well-cut (no window and no extinction areas)
- with lustre and brilliance
Due to tight supply of fine quality sapphires, prices will unlikely come off anytime soon.
In recent years, supply of medium to fine quality rubies have dwindled to almost a standstill. When we say medium quality, the bare minimum standards that the gemstone must meet are at least:
- Good Lustre
- even colour, especially when viewed top-down (looking down at the table/face of the gem)
Last but not least, the all-important factor, and deal-breaker: whether the gem is heated or not. Please note that some jewellers may tell you that a gem is natural. This does not mean that the gem is unheated. To them, “natural” means that there is no external material being introduced into the gemstone. However, the fact remains that heating of gemstones is a process carried out to enhance the colour of the gem, without which, the original colour of the stone will look lacklustre or less vivid or less intense.
A good example as below:
2.1ct unheat ruby
2.35ct heated ruby
Heat treatment is typically used to enhance colours of a gem and may also be used to improve clarity of the gem. As such, most aesthetically beautiful gemstones commonly seen in jewellery shops are have been heated.
Why we disclose to clients if a gem has been heated or not heated: simply because heated gemstones command a different price to unheated gemstones. Also, unheated and beautiful gemstones appreciate in value the quickest and hold their value the longest. Without a doubt, if money is no issue, beautiful unheated gems are the way to go.
2.03ct unheat blue sapphire
3.5ct heated blue sapphire
In this case then, does this mean that all unheated gemstones are not as gorgeous and beautiful as heated gemstones? No, this is where our specialty lies. Our clients come to us to source for unheated, yet beautiful gemstones.
Approximately 85% of all gemstones available in the market are heated. Of the remaining 15% that is unheated, possibly only 35% – 40% of these are aesthetically beautiful. Naturally, a premium is paid for unheated, yet gorgeous gemstones.
The blue topaz is a December birthstone. Apart from the blue topaz, other december birthstones include tanzanite, blue zircon and turqoise.
This sparkling shade of blue commonly seen is called a swiss blue topaz. It is an affordable gem that can be set into beautiful fine jewellery.
This is a cushion-shape 3.9ct swiss blue topaz set in a single-halo, double diamond shank design, in solid 18K white gold. On its own, it looks beautiful. Once worn, as shown below on client’s hand, it is captivating. A ring of this colour and size will definitely draw attention even from afar.