Skip to content

A Guide to Chandelier Crystal Quality: What to look for

The right crystals on the right chandelier are the symbolic jewels of the home. If you think about jewelry for a moment, the quality of the precious stones incorporated into jewelry says much about the man who has the taste and the economic wherewithal to acquire them.As with everything in life, there are grades of crystal, and -- also as with most things -- you get what you pay for. 

What does good quality crystal look like?

Our industrial lighting aesthetic largely incorporates raw industrial pipe and glamorous high-quality Bohemian crystal – to provide a complimentary unified whole – so a heavy emphasis is placed on this high-quality crystal to provide that signature Michael McHale Designs industrial chic beauty. Interior designers and other subject matter experts place heavy emphasis on crystal quality when making the purchasing decision for a modern chandelier.

What’s crystal made of?

At root, crystal is comprised of two basic ingredients — silica (sand) and lead oxide. Lead oxide is added to a basic glass mixture (silica, potash), which will allow for the light passing through to refract. What is it about lead which allows light to refract when added to glass? That is an interesting scientific question, but outside the focus of this home design oriented post.Leaded glass contains from 5-20% lead content. Leaded glass is typically used in churches and for certain applications in older homes. It is typically not used in contemporary window-treatments but the formula is used in cheaper crystalOnce the lead content gets above 20%, it is considered crystal. The maximum lead content for crystal is about 30%, which allows for greatest refraction of light. While that lead content tends to make crystal more fragile, this is less of a problem for chandelier crystals than it is for other types of crystal (decanters, stemware, etc.), which need to be more robust because they are regularly handled.Once the chandelier crystal is in place, fragility shouldn’t be much of a problem (assuming that you’re not regularly swatting insects or bats anywhere near your chandelier).Lead content is only one of the factors that indicate crystal quality. The care taken during the manufacturing process of crystal is perhaps even more important than the raw ingredients in determining crystal quality.


Obviously, the raw ingredients are heated to extremely high temperatures. Everyone has seen images of hot glass in liquid form glowing bright orange, and that is how crystal is created.Left to itself, leaded crystal will cool like a cake: the outer part cools quickly, and the inner core takes longer to dissipate heat. That differential in temperature means that the inner parts of the crystal cool off later than the outer parts, and that can leave very fine striations in the crystal. You probably wouldn’t notice them on first glance — you might even mistake them for fingerprints. But those tiny striations can distort the light passing through the crystal. Once you notice them, they will be hard to ignore.  Cheaper crystal is made without any control of the cooling process, and can therefore show these subtle distortions. The other thing to watch out for is bubbles. Cheaper crystal can often have a tiny bubble or two trapped inside.  Once you see a bubble, you can't un-see it.

Optical Purity in Chandelier Crystals

When crystal is free of flaw such as these, it is called “optically pure” meaning that light is able to pass through the crystal without being distorted by flaws. The manufacturer will control the manufacturing and cooling process so that each crystal cools in a controlled way. Quality inspectors will ensure that there are no bubbles or other flaws which would compromise quality. McHale Chandeliers use top-quality optically pure bohemian crystal.

What about Swarovski Crystal?

Chances are if you have heard of any “brand” of crystal, it’s Swarovski. They seem to be everywhere these days. At Michael McHale Designs, we love Swarovski crystal. It is without a doubt some of the finest crystal available. The only downside to Swarovski crystal is, of course, the price: Having a chandelier with 100% Swarovski crystal can easily double the price of your chandelier or fixture. If price is no object, or if you have a particular interest in the resale value of the piece, Swarovski is the way to go.We can make any of our fixtures with Swarovski crystal as a special order. Most of our customers, though, opt for our optically pure gem-cut crystal. This crystal is also 30% leaded for maximum refraction and also optically pure – just without the Swarovski brand name. It would take a very sophisticated eye to tell the difference. A note on our colored crystal options (which are options for our Industrial and Bryce Collections): When it comes to colored crystal, Swarovski has no peer in terms of clarity and brightness. So if you order colored crystal from us, it will always be Swarovski.



"Lighting is important. It's the first thing we notice when we walk into a room. Shouldn't your lighting be about something?" Read more.

Michael McHale
Founder of Michael McHale Designs


Be the first to know about Latest Styles, New Arrivals, and Special Offers