It also has great heat resistance and electrical properties, resulting in its use in electronics. Quartz is chemically inert with most substances. Thus, although quartz is one of the more common and less expensive gemstones, it’s still good for jewelry. Another use for quartz is in counter tops. A variety of quartz, novaculite, is often used for sharpening knives. 7 is about as low as a gemstone can be for use in jewelry. Without argument, between quartz vs diamond, diamond has better hardness. On the Mohs scale of hardness, quartz ranks a 7 and diamond is a 10. Ideal and super ideal cut diamonds have the greatest brilliance. Diamonds have so much brilliance that even the fair cut grade has decent brilliance. Gemstones with good cuts have better brilliance than those with poor cuts. The two beams travel at a different speed and on a different path in the gem.Ĭut can influence the brilliance of a diamond. Double refraction is when light splits into two beams upon entering the gemstone. Another difference between quartz vs diamond is diamond is singly refractive whereas quartz is doubly refractive. The higher a gemstone’s refractive index, the more brilliance it has. Its refractive index is 2.42, compared to quartz’s refractive index of 1.54-1.55. Difference in Brilliance Image Source: īetween quartz vs diamond, diamond has better brilliance. Diamonds with very good to excellent cut on the grading scale have the best sparkle. Quality of cut is an important factor in determining how much the diamond sparkles. Although diamond in general has great sparkle, some diamonds have better sparkle than others. Quartz reflects light through its natural luster, allowing it to give an attractive twinkle effect. Difference in Sparkleīetween quartz vs diamond, diamond is known for excellent sparkle. Colored diamonds are more valuable than white diamonds because they occur far less frequently in nature. That may lead you to believe colored diamonds are less valuable than clear diamonds, but the opposite is true. Color in a diamond results from impurities or structural defects. However, the properties of a colored diamond are slightly different than clear diamond. But today scientists look at the mineral’s microstructure too.ĭiamond is similar in that people are usually referring to the clear variety unless they specify its color. Historically, quartz was differentiated based on color. What we call quartz is the clear variety. For instance, pink quartz is called rose quartz. Colored quartz goes by different names depending on its color. Quartz comes in many different colors like pink, yellow, blue, and purple. Below, we will explain the similarities and differences between quartz vs diamond, including color, sparkle, brilliance, hardness, clarity, cut, and price. However, you will want something more durable for an engagement ring. If you want jewelry with clear gems that sparkle, then quartz is an acceptable choice. Stunning Bulgari blue diamond brings in $37.Many people wonder if quartz is a suitable diamond substitute because of its clear color. Lucky numbers: Infinite Blue expected to make waves in Hong Kong The Fancy Colour Diamond War of Words: Science or Romance? $77 million: Blue diamond expected to shine in Geneva The most expensive blue diamonds sold at auction are the 15.10-carat De Beers Blue and the 14.6-carat Oppenheimer Blue, which both returned more than $US57 million ($AU90 million).įancy colour yellow diamonds hit the auction block “It's been an honour to have been entrusted with the opportunity to offer a diamond of such breathtaking beauty, its price attesting to the resilient demand for top quality coloured diamonds amongst global collectors," he said. T he Infinite Blue is one of the few blue diamonds above 10 carats that have gone under the hammer and was discovered in the Cullinan Mine in South Africa.Ĭhairman of jewellery and watches for Sotheby’s Asia, Wenhao Yu, said that while the Infinite Blue may not have set any new records, demand for fancy colour diamonds remains strong. It was something of a disappointing outcome at auction after narrowly missing its $US26 million ($AU40.88 million) presale estimate however, it did achieve the third-highest return for a blue diamond in Asia.
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