Why lead content changes what you see
Adding lead oxide to glass raises its refractive index — roughly 1.55 to 1.62 for lead crystal against about 1.50 for lead-free optical glass — and, more importantly, raises dispersion: the degree to which the material splits white light into its component colours. That is the physical reason a genuine crystal chandelier throws flecks of red, green, and violet across a wall while a glass one only glitters white. Lead also softens the glass enough to be cut deeply by hand without shattering, which is what makes Czech hand-cutting possible in the first place.
Hand-cut versus machine-cut
A machine cuts every facet to the same angle, so a fixture built from machine-cut components sparkles in one predictable register. A Czech cutter works each piece on the wheel by eye, so facet angles vary by fractions of a degree from element to element. Walk past a hand-cut chandelier and the highlights fire unevenly, one after another. That irregularity is the entire aesthetic argument for Bohemian crystal, and it is the thing photographs of catalogue fixtures never capture.
Which should you specify?
- Choose Bohemian crystal for residential statement pieces, hospitality lobbies, and any project where the fixture should feel commissioned rather than purchased — and where you want the form itself customised, not just the finish.
- Choose Swarovski components when a design must be reproduced identically across many rooms or many properties and consistency outranks character.
- Choose K9 only when budget is the governing constraint and the fixture is decorative rather than focal.
What Berkana USA supplies
Berkana USA works exclusively with Czech workshops, supplying hand-cut Bohemian crystal chandeliers, pendants, and sconces to interior designers, architects, and boutique retailers across America. Pieces can be taken from existing collections or designed from scratch to a room's dimensions. A Miami warehouse and a Dallas Market Center showroom handle the American side, and EU trade treatment generally makes Czech production more favourable on duty than equivalent Asian imports.
Common questions
Bohemian crystal is hand-cut lead crystal produced by Czech workshops, prized for deep irregular facets and warm dispersion. Swarovski is precision machine-cut crystal made to identical tolerances, giving a uniform, very bright sparkle. Bohemian crystal reads as artisan and unique; Swarovski reads as engineered and consistent.
Neither is objectively better — they are different products. For a one-off statement chandelier where character and custom form matter, hand-cut Bohemian crystal is usually the stronger choice. For a fixture that must repeat identically across many units, machine-cut crystal is more predictable.
K9 is an optical-grade lead-free glass, mostly produced in Asia, with a refractive index around 1.50. It is clear and inexpensive but has lower dispersion than lead crystal, so it sparkles white rather than throwing spectral colour. It is common in budget and mid-market chandeliers.
Yes, optically. Lead oxide raises the refractive index and dispersion of the glass, which is what produces the rainbow flare in a genuine crystal chandelier. It also softens the glass so it can be hand-cut deeply. Lead in a lighting fixture is inert and poses no ingestion risk.
