Quartz is silicon dioxide (sand). Diamond is an allotropic form of carbon.
There are several differences, the primary one being that on the Mohs hardness scale, diamond is 10, quartz is 8. Quartz crystal is very hard, but diamond is harder.
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There are many differences between quartz and diamond. Primarily, quartz is much softer than diamond. Damond's hardness measurement of 10 -- on the Mohs scale -- is the highest hardness level. Quartz Locations: Brazil, Madagascar, Mozambique; Colors Found: Various; Family: Quartz Hardness: 7.00; Refractive Index: 1.50; Relative Density: 2.60 - 2.70 Diamond Locations: all continents except Europe and Antarctica; Colors Found: Various; Family: Carbon Hardness: 10.00; Refractive Index: 2.41; Relative Density: 3.50 Quartz and diamond have different chemical compositions: diamond is pure carbon, quartz is silicon dioxide.
There are double-terminated quartz crystals that have remarkable clarity and smooth crystal faces, which have non-scientifically been referred to as diamond quartz--the Herkimer Diamond is one so-named type of quartz crystal.
Same thing its a trade mark by the Le Vian company for marketing. Example a brown diamond is now a Chocolate Diamond.
You may be thinking of a Herkimer diamond, which is quartz, not diamond.
No. A diamond is a diamond: quartz is quartz. Both have different chemical elements and different molecular structures.
Quartz is a naturally occurring form of silica that often contains impurities.
Quartz movement is more traditional. Kintetic quartz relies on different principles and is a bit more accurate.
Diamond is composed of the element carbon, and quartz is composed of the elements silicon and oxygen.
Diamond is a non-quartz gemstone.
Quartz diamond crystal, commonly known as Herkirmer diamond, is not the same as diamond. A Herkimer diamond can be set in a wedding ring.