Then there are crystals which are acknowledged as being fake – where no deception is involved. Or they may be heat-treated to obtain the desired colour.ĭyed howlite is often passed off as turquoise you can usually tell because the colour is so bright that it actually looks fake – but if scratched, you will also see it’s white inside. Likewise, any rose quartz, citrine, or amethyst that is really vibrant and very uniform in colour can often be dyed a tell-tale sign of this is that excess dye can collect in the cracks.
You can only get that level of vibrancy by dying the agate. You will often find fractures and flaws in quartz crystals – but not always, A Grade, high quality quartz crystals are as clear as glass (but no air bubbles remember!)Īdditionally, quartz is harder than glass – so you will be able to scratch a piece of glass with a genuine piece of quartz without damaging the quartz.Īll of those bright green, deep blue, violet and fuchsia agates – they’re dyed. Since convex shapes magnify (indeed, the first spectacles were made from convex quartz) it is actually very common that your genuine quartz crystal will magnify as a result of its shape.īecause of the quick cooling process used to make glass you will often find tiny air bubbles in fake crystals, quartz never has air bubbles. It is often stated that glass magnifies and quartz does not – this is NOT an effective testing method. In truth, the only way to be 100% certain is by lab testing, but being realistic, there are a few ways to help you to make an educated guess!
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