The definition of rhinestones is "An imitation diamond, used in cheap jewellery and to decorate clothes." according to Oxford dictionary. Besides, according to Merriam Webster, America's leading and most-trusted provider of language information, rhinestone is "imitation stone of high luster made of glass, paste, or gem quartz."

We can tell from its definition that the word "rhinestone" can be used widely. From the high-grade Swarovski crystal to normal glass stones or inexpensive plastic stones like acrylic or resin material, they can all be called as rhinestones. There are many kinds of Rhinestones such as Hotfix Rhinestones, Glass Flatback Rhinestones, Flatback Rhinestones, Non Hotfix Rhinestones, Shaped Rhinestones, Non Hotfix Shaped Rhinestones, Hotfix Shaped Rhinestones, Nail Rhinestones, Small Rhinestones, Micro Rhinestones, etc.

Ways to Tell Rhinestones and Diamonds Apart

Here are some of the most reliable ways to distinguish between diamonds and rhinestones:

Fog Test

A distinctive characteristic of diamond is that due to its physical properties, it does not retain moisture on its surface for a long time. So, if you breathe on a real diamond, the fog created from your breath on the stone will dissipate very quickly, almost instantaneously. If you do the same test with a rhinestone, however, it will stay foggy for some time (usually 5-10 seconds).

Reading Test

Diamonds distort the light that passes through them, and this is why if you try to read printed text through a real diamond, the letters will look blurry. If you try to do the same with a rhinestone, the text will be more easily readable (close to how you would see it through glass). Keep in mind, however, that diamonds that are cut shallow and have parallel walls (e.g., emerald-cut or baguette-cut stones) may not distort text as visibly, making this test inconclusive.

Rhinestones Are Softer than Diamonds

Diamond is the hardest gemstone, and whatever imitation you are looking at, it is bound to be softer that the real thing. Because they are not as hard as diamonds, rhinestones are much easier to scratch, and over time, these scratches accumulate on their surface. Diamonds, on the other hand, are nearly impossible to scratch from everyday wear (they can chip if hit too hard, though). The relative softness of a cut rhinestone can also be seen in its facets, whose edges tend to be somewhat round for that reason. The edges of a diamond's facets are sharper, and due to the hardness of the material, they do not wear out with time.