Home / General / What’s the difference between Swarovski Crystal, Diamonds and Cubic Zirconia?

What’s the difference between Swarovski Crystal, Diamonds and Cubic Zirconia?


‘Diamonds are a girl’s best friend,’ a phrase and song made famous by the 1949 movie Gentlemen Prefer Blondes in which Marilyn Monroe first performed the song. Today the saying is very much true, but traditionally gold bands were used for the symbol of a wedding union until 1938 when DeBeers launched their advertising campaign “A Diamond is Forever”. The ad campaign is regarded as one of the most successful in history and changed the general public’s perception of diamonds. No longer were diamonds seen as a gem reserved only for Royalty and the highest of society, they came to represent love, affection and faithfulness. Nowadays Diamond engagement rings are not only glamorous they have a very special meaning attached to them, they symbolise commitment and the next chapter in a couple’s life, which combined with their beauty is why they are so desirable. For years the price of diamonds were kept artificially high by carefully controlling the quantity of diamonds that were allowed to reach the market place by one company who had a monopoly over their distribution. Today this is no longer the case as diamonds are available from various channels around the world where their price is governed by globalized market economies. There is still a growing demand for diamonds and with their diminishing supply and extremely high costs other less expensive substitutes are used in their place.

Unlike other gemstones diamonds are formed in the earths mantle a semi-molten layer between the earths outer core and crust that’s subject to extreme heat and pressure. At depths of over 100 miles below the earth’s surface the simple carbon containing minerals were transformed into diamonds by the heat and pressure of their surroundings. All of this happened between 1 billion to 3.3 billion years ago when the earth was much hotter than it is today. We can’t mine down far enough to reach the earth’s mantle but fortunately volcanic eruptions have done the job for us. The last of these magma volcanic eruptions occurred over 20 million years ago which brought up diamonds close enough to the surface so that they could be mined.

Diamond, Cubic Zirconia, Moissanite and Swarovski Crystal

Real Diamonds
Diamonds are naturally occurring gems that are composed of carbon atoms arranged in a particular structure. They are extremely hard and until recently were regarded as the worlds hardest natural material with a rating of 10 on the Mohs hardness scale. Although diamonds are extremely expensive their price is very much governed by what’s known as the four Cs, carat, cut, colour, and clarity. It’s very rare to find a diamond that doesn’t contain flaws which is why such diamonds demand a high price the same can be said for colour. Most diamonds along with having small amounts of defects or impurities will have a tinge of yellow or brown which is why truly colourless diamonds are so rare.
Diamonds have a high refractive index of 2.417 and a dispersion of 0.044 which means that when light passes from air to a diamond which has a different density to air the speed of light slows down and bends the light due to the angle of refraction. The different colours that make up a white light slow at different speeds and are split up or separate once they enter the diamond. This separation of the colour spectrum is called dispersion and as light leaves the diamond material and enters the air the angle of refraction again bends and the dispersion, which is the separation of white light into different colours (which the light already contains) increases and gives us a colour spectrum. A Diamond is also an electrical insulator but the best natural thermal conductor known being 4/5 times more conductive than copper. Diamonds have a specific gravity of between 3.5 – 3.53 which is the density of the material in comparison to the same amount of water and is useful for gem identification by gem buyers and gemologists.

Diamond Dispersion

Cultured Diamond
Cultured diamonds or synthetic diamonds as they are sometimes called have been in production since the mid 1950’s although the technology could only produce small diamonds. Over the past few years the technology has rapidly advanced and now two companies are able to produce diamonds that are identical in hardness, dispersion, gravity, refraction and chemical composition to the highest quality mined diamonds available. Where as a one-carat top quality diamond would cost thousands of pounds to buy, the same quality man made diamond could be made for less than £5. This will obviously have a huge impact on the diamond industry over the next few years as when comparing a cultured and mined diamond side by side they are virtually undistinguishable, however they can be differentiated by spectroscopy, infrared, ultraviolet, or X-ray wavelengths. Cultured diamonds can be grown from a single crystal by using a technique called chemical vapor deposition. The technique works by placing cultured crystal seeds in a chamber where hydrogen and methane gases are passed through. The chamber is subject to high heat and pressure which causes hydrogen and methane deposits to collect on the diamond crystals steadily growing them in the process.

Cubic Zirconia
Cubic Zirconia is currently the most popular substitute to a diamond because to the untrained eye they look identical. Cubic Zirconia or CZ as it is referred to is made from zirconium dioxide a different material than diamonds, which although a different chemical composition comes closer than any other gem to matching the characteristics of a diamond. Natural CZ was first discovered in 1899 but it wasn’t until the late 70’s that man made CZ first came into production for use in jewellery. CZ on first impression looks just like a diamond but under close inspection there are differences, it has a gravity of between 5.6 and 6.0 which means it’s 1.6 times the weight of a diamond. It has a hardness of 8 on the Mohs scale, a refraction index of 2.176 and a dispersive power of 0.060, which means that it’s not as hard as a diamond, it’s slightly less sparkly but displays more prismatic fire which means more colour sparkles within the gem. Another point to note is that natural diamonds display impurities which CZ doesn’t its also clear in colour which most diamonds aren’t, but they can be coloured by adding metal oxides in the production process. Unlike diamonds CZ are good thermal insulators which mean they become warm but can’t withstand the same kind of heat a diamond can, which is one test that is used to distinguish diamonds from CZ. Caring for CZ is important because they are more brittle than diamonds and susceptible to wear and tear such as chipping and scratches over time.

Moissanite is another diamond substitute which is a rare mineral that can be found naturally in small quantities although jewellery Moissanite is artificially made. It’s made from Silicon Carbide which means it’s able to withstand high temperatures and is very hard with a Mohs scale reading of 9.25. There is currently only one manufacturer of Moissanite gemstones, Charles & Colvard who have a patent that will expire in 2015. Once the patent expires it will likely become more readily available at a cheaper price when competitors can also manufacture the gemstone. Moissanite is slightly lighter than a diamond with a gravity of 3.21 which isn’t that noticeable but it has a refraction index of 2.65-2.69 and a dispersion of 0.104. This means that Moissanite is noticeably much sparklier and displays more prismatic fire than a diamond which is noticeable even to an untrained observer. Moissanite does have inclusions like a diamond and it may also have a greenish tinge to its colour.

Swarovski Crystal
Swarovski Crystal isn’t a gemstone or even a crystal it’s a form of glass that’s made at high temperatures by melting silicon oxide powders with lead to form what is known as lead crystal. The exact process is one that’s patented by Swarovski but it has approximately 32% lead content to increase the crystals refraction index to resemble that of a diamond. To produce a diamond like effect the crystal glass is precision cut and then polished again by a Swarovski patented process that gives the crystal a high quality finish. The crystals are often further enhanced by coating the glass with an Aurora Borealis or AB coating that gives the surface a rainbow like appearance to simulate dispersion from a diamond. Swarovski crystal has a Mohs hardness of between 6-7 so its susceptible to scratches and chipping from wear and tear but at the same time it’s harder than standard glass. The lead content in the crystal increases the refraction index of the glass from 1.5 to 1.7 to give the faceted faced a more sparkly appearance.

Whichever gem or crystal you decide to use for your jewellery designs you can be sure that any of the above will provide the beautiful sparkle they are all intended for. For most the choice will come down to cost Swarovski is undoubtedly the most cost effective diamond alternative. It’s a brand that’s synonymous with quality and elegance which is why it’s used by so many of the top fashion houses around the world both in their designs and in conjunction with promoting their own brand. Cubic Zirconia on the other hand doesn’t have the brand name of Swarovski, costs slightly more but can offer a more hard-wearing solution for adding a diamond substitute to your jewellery designs. It’s worth noting that Swarovski make a CZ range which is worth looking into as you get the brand coupled with a high quality gemstone without the stigma of a CZ fake diamond. As we see more cultured Diamonds enter the market and become more readily available it’s likely that we will see a price drop in the genuine article. Or maybe people will become perfectly happy to accept a man made version in its place because after all it’s appearance that’s important when you are looking for an engagement ring not the rings history. View our range of Swarovski Crystals

Author: Crystal and Glass Beads



  1. I reckon each have their own use. Diamonds for engagement rings. Zirconia and Moissanite are a great alternative for those who can not afford diamonds and Swarovski crystals for costume jewellery as well as enhancing some of the beautiful fashion garments that women love to buy.

    As a side not it’s also great for those artistic people who like to jazz up their shoes and stuff 😉

    • Will be nice to see some of the cultured diamonds come on the market for engagement rings and jewellery especially if they can make a flawless one-carat top quality diamond for less than £5, hopefully they won’t cost mined diamond prices.

    • Moissanite in the current market is a lot more expensive than Swarovski Cyrstals.

  2. I was wondering where you got the picture comparing the diamond and diamond simulants. It’s for a research paper.


  3. Shreyansh Dedhia

    Hi Khaled,

    It’s a brilliant article, clarifies so many doubts. Thank you, Khaled. I am interested to learn more about Cubic Zirconia and Culture Diamonds. Do you know, if there are ready materials available on the same? Or do you know any gemological institute which conducts courses for such a product? Could you get me in touch with anyone who would have the knowledge for this?

    Would really appreciate your help.

  4. Hi! I bought my friend a sterling sliver 925 ring (rhodium plated) for her birthday. It was cubic zirconia. Would it be worth more than one the same but swavroski crystal?

  5. Read this article and thought it was pretty neat. Is there any difference if a stone on a ring is cubic zirconia with Swarovski Elements in the stone cause I am buying one and wanted some feedback on it before I buy it

    • Hi Adam
      Cubic Zirconia and Swarovski elements are different, generally Cubic Zirconia is more like a diamond than a standard Swarovski element which reflects in the price. However Swarovski also make their own range Cubic Zirconia which are not part of the elements collection.

  6. Khalid
    We’ve just bought a “black” diamond engagement ring from a company in China. I’m little disturb now about the value of our purchase and whether we can insure it?


    • You can take it to a diamond specialist and have it valued which will also give you peace of mind that it’s a genuine diamond of the clarity/weight specified when you purchased the ring. If you are not happy you can return it.

  7. Christine LeDrew

    I am looking for Cubic Zirconia beads that looks like a diamond but I need them with holes in them to put a pinch bail for necklace and earrings. Does anyone know where I can find such a bead?

    • Hi Christine
      If you do a seraph for “drilled Cubic Zirconia” or “cubic zirconia drilled beads” you should find what you are looking for.

  8. I hv a crystal diamond so i dnt knw its worthy to sell

  9. I am planning to buy an engagement ring and I saw Swarovski a lot and it’s really cheap but from the looks of it, Cubic Zirconia is the way to go. My question is experience-wise, up to how long can a Cubic Zirconia stone in an engagement ring (definitely not going to be worn a lot), last? If possible, in percentages, if Diamond is near indestructible, then up to what percentage does Cubic Zirconia live up to? Is it like 80% of Diamond’s durability or something? I just don’t want the ring I’ll buy to chip and wither away easily through the years.

    • Hi Nikko I don’t think either Swarovski or Cubic Zirconia are hard enough wearing to last long term especially if the ring will go through the rigours of daily use. I wouldn’t imagine it will last longer than a few years. There are other alternatives to consider such as a moissanite stone ring.

  10. Hi I have a Swarovski set (earnings,necklaces and bracelet ) I want to sell it Can you please advice If I can sell it in Swarovski store?

  11. Hey! I’m buying someone special to me a pearl ring for valentines day and I just wanted to know which of the three would be the best way to go. *Side Note* She is probably going to wear this a lot. So that point, I assume, should be factored in when making the choice.

    • Hi There is such a huge difference in the price of the 3 that the choice will be pretty much down to budget, but im sure she will love whatever present you buy. Of the two Cubic Zirconia or glass Swarovski I would opt for Cubic Zirconia if it’s a single stone as its a lot more durable/hard wearing, if it’s a set design that you like then it will be based on the look of the ring as opposed to the stones. Swarovski also make Cubic Zirconia and 100% carbon laboratory diamonds as well as the cut glass crystals they are well known for.

  12. Dear Khaled, is there any laboratory in Asia, USA or Europe that can confirm if my supplier is really using Swarovski or other glass type that is just similar. Does that kind of test actually exist?

    • Hi Ino, you should be able to tell by the clarity, cut of the crystal, the colours and the backing if you remove one if their Swarovski.

  13. I am totally confused. Looking for an alternative to a diamond ring. CZ, white sapphire, or Swarovski ? Large stone, lots of wear. What about gold plated ?

    • It would completely depend on your budget as to what stone you choose. Either way you can find beautiful rings in all stone types.

    • Hi Gary, it may be too late, as you may have purchased but in case…here are my thoughts as a woman with a pretty large jewelry collection containing all those choices plus Moissanite. CZ is the least expensive but also the least coveted. Swarovski is lovely but does not disperse and does get cloudy, it’s not my favorite for rings, but nice for a pendant or earrings. White Sapphire is natural (or lab grown, you’ll need to read carefully). It’s got it’s own look – I guess I would call it denser shine, like it doesn’t really reflect like a diamond. The ones I have need really frequent cleaning to keep their shine. If you are looking for a “natural – earth grown” substitute it is a good one. If you are going with lab grown for ecological reasons then you might go lab grown white sapphire, but if you are going lab grown, honestly the best choice imho is a charles & colvard forever one or forever brilliant depending on your budget and if it will stand alone or with a colored gemstone. I have a forever one with blue sapphire and it’s pretty stunning in white gold (or sterling ). Forever Brilliant has a more…true diamond look, because it’s not quite as what they call “disco ball shiny”. So it looks more like a diamond if that is what you are after. I make no apologies for my 1.5 ct forever one. I don’t pretend it’s a diamond. I like it for what it is, a lab grown version of material that came from the heavens to land in a meteor crater on Earth. The whole “is it a diamond” thing is just advertising nonsense. I paired mine with a thin curved moissanite band and it literally shines in the least light, like outdoors in starlight. I’m definitely a moissy girl. Best of all, the ring I have, if it were the quality of diamond I’d need to get this kind of clarity and shine would have cost more like 17,000 and not 1700. That’s money for a great honeymoon or a down payment on a house…just saying.

  14. Dear Khaled,

    Thank you for sharing this article,

    We are little confused between onyx and black diamond are they man mad or natural ?

    I found one website who are manufacturing some thing like that,

    Thank you,

    • Onyx is a semi precious stone where as black diamond as in the colour is part of the Swarovski colour pallet for crystal components.

Leave a Reply

Your email address will not be published. Required fields are marked *