History of CVD Diamonds
Do you know that when the first commercially available “man-made” diamond was produced? Don’t Know. Man made diamonds are also known as synthetic diamond or CVD diamond in 1956 by General Electric at High Pressure, High Temperature (HPHT). HPHT growth imitates natural diamond formation, but with carefully selected input materials to catalyze crystal growth. Today, billions of carats of diamonds are produced every year by the HPHT process, mostly for industrial applications.
What Are CVD Diamonds?
CVD diamond also referred as laboratory-created is diamond produced by means of a synthetic method, as compared to real / natural diamonds, which are generated by physical processes. Also, these diamonds are also usually known “HPHT” after the two ordinary productions. In addition, CVD diamonds started appearing in the gemstone diamond market many years ago, and the process involved bringing in a gas like methane into a vacuum chamber, after that activating and breaking down the molecules of the gas with microwaves, which causes the carbon atoms to accumulate on a substrate like the way snowflakes accumulate in a snowfall.
There are mainly two methods of manufacturing CVD diamonds, the first one is high pressure high temperature (HPHT) and the other method Chemical Vapour Deposition (CVD). The HPHT method used to successfully grow diamonds in 1954 by General Electric, basically mimics the natural process. The HPHT process is costly, and provided the energy and equipment needed and produces diamonds with mostly brownish or yellowish yellow colors. On the other hand, CVD method is inexpensive because it works at moderate temperatures with a low pressure that needs smaller and less costly tools. Colorless crystals can be grown as the vacuum chamber contains mainly carbon and some hydrogen. Yellow or blue CVD diamond crystals can be produced if boron or nitrogen is introduced into the chamber.
Why CVD Dimonds Are Inexpensive
Today, everyone is curious about why CVD synthetic diamonds are very less in prices. Synthetic diamonds about 30%-40% cheaper than normal diamonds. However, a common question in the diamond trade and among buyers is whether CVD synthetics will sooner or later be manufactured so inexpensively that the value of natural diamonds endangered, and the answer to that question is a big “NO”. But, the growth of CVD will become more efficient because of scale and manufacturing experience, many factors will only become more costly with inflation and time.
First, the cost of CVD diamonds cutting and polishing is really the same as for natural diamond as well as the highly skilled artisans will still be required to produce beautiful man-made diamonds. The electricity is the second factor as the electricity needed to produce a one carat diamond does not scale considerably with the number of chamber size or seeds. We know that electricity is a major cost and expected for one to continue rising in the future. Producing seeds are a third cost that is a major overhead, and is not likely that a costly alternative for a diamond seed will ever be found.
CVD synthetics can be developed in a range of sizes and colors with high clarity. Besides, the gems produced are durable and eye-catching as natural diamonds. It is vital to note that the GIA has the ability to identify and grade CVD synthetics, which will continue to protect consumers and the truthfulness of the diamond industry. Those people who cannot afford a real diamond, then the lower prices of CVD might be viable options to go for, particularly if you are considering buying colored stone. Also, lower prices, buyers of CVD diamonds can be certain that their purchase is a 100 % conflict-free as they originate from a lab.
Both CVD and HPHT diamonds can be cut into stones as well as different colors can be produced, including yellow, brown, green, blue, orange and clear white. Besides, synthetic diamonds are generated HPHT and by CVD techniques. Usually, they are available in yellow, blue and even in white. The blue color produced from boron while the yellow color arrives from nitrogen impurities in the industrialized process. However, other colors like pink and green are feasible after synthesis through irradiation as well.
Why Cvd Diamonds Were Very High Sales In Recent Hk Show 2015 In June
CVD Diamonds grown diamonds are the hot topic of discussion in the recent Hong Kong Jewellery & Gem Fair (June Fair). This show is one of the Asia’s top three fine jewellery events. This 29th edition June Fair was happening at Hong Kong Convention & Exhibition Centre from 23 to 26 June 2016. This event was the must-not-miss midyear trading event for gemstones manufacturer, suppliers and of course wholesale buyers of CVD diamonds. More than 2,300 exhibitors from 45 countries participated in this mega gemstones event. CVD diamond was very high in sales in this June fair in spite of most CVD diamond sellers not reducing prices because they had a high cost of purchase, which doesn’t make it feasible to cut prices. Also, about 90% of buyers surveyed and 95% of exhibitors consider Hong Kong’s fairs a major channel to find new suppliers and 80 % of exhibitors consider the fairs a major avenue to promote new products.
Although buyers have some CVD retailers to choose from, but there is one pioneer in the field currently selling synthetic or CVD diamonds for up to 50% less compared to natural diamonds. Navneet Gems & Minerals situated in Thailand can be the best source for CVD diamonds for wholesale. The company is selling synthetic diamonds, including colorless up to 30% less than their mined equivalents.
The synthetic or CVD and real diamond markets complement each other as well as will co-exist. Also, people who want to buy real diamonds with paperwork don’t consider lab-generated diamonds as an acceptable alternative. Additionally, those people who are only willing to pay for CVD diamonds at lower prices may not always consider natural diamonds that could BE very costly, although the price is believed a bargain. Besides, fearing the presence of CVD diamonds, jewellers can play to their benefits by providing both synthetic and natural diamonds for a great range of price points as a result a broader customer base.