Asscher Cut Moissanite: Step Cut in a Square Frame
The Asscher is a square emerald cut: stepped facets, clipped corners, almost no sparkle and a great deal of clarity. In moissanite the risk is not inclusions — it is a badly cut pavilion showing straight through the stone.
Asscher is a step cut in a square frame
Joseph Asscher in Amsterdam built the first of these in 1902: a square stone with cropped corners and parallel pavilion facets. It returned with the Art Deco revival.
What defines it is the facet style, not the outline. A brilliant breaks light into many small reflections; a step cut arranges long rectangular facets in rows, so light bounces between parallel planes and exits in broad bands. The result is a "hall of mirrors" — you look into the stone rather than at a sparkle.
How the steps work
A typical Asscher has three rows of steps on the crown and three on the pavilion, ending in a small flat culet instead of a point, with a large table and a low crown.
Because the facets are flat and parallel, the stone behaves like stacked mirrors: tilt it and the bands slide across in sequence rather than flashing individually. That slow movement is the appeal.
Clarity has nowhere to hide
On a diamond the standard advice is VS or better, because a large flat facet acts as a window onto anything inside. A feather under the table of a step cut is visible across a room; inside a brilliant's facet maze it disappears.
Moissanite changes the arithmetic. Our stones are grown, D color, VVS1, so inclusions are not the problem. What replaces clarity as the risk is cut precision. A careless step cut shows every error: uneven step widths, a wandering girdle, a pavilion angle that leaks light. Judge the cut, not the grade.
The window effect
A window is a transparent area where you see through the stone to the band beneath. It happens when the pavilion is too shallow for the table, so light passes through instead of reflecting back — and step cuts invite it, with their large table and low crown.
Hold the stone over a page of text at arm's length. If you can read the print through the middle, it has a window, usually a bright glassy band down the center with a dark extinction stripe beside it. A well-cut stone shows you its own facets.
Birefringence is loudest in a step cut
Moissanite splits incoming light into two rays traveling at different speeds. In a brilliant the doubling scatters across dozens of small facets and reads as fire. In a step cut the facets are long, straight and parallel, so the doubled image appears as a second set of lines alongside the first. The stone looks slightly ghosted along the step edges.
Below 1.5 carats this is subtle and most people never notice; above it, the lines are long enough that doubling shows without magnification in daylight. Stay under 1.5 carats if that bothers you. If not, you get more fire than a diamond at a fraction of the price.
Ratio and the cut corners
An Asscher should be square: length-to-width between 1.00 and 1.05. Past 1.10 it is a rectangular step cut — a legitimate stone, but that is essentially an emerald cut.
| Asscher | Emerald cut | Princess | |
| Facets | Stepped, parallel | Stepped, parallel | Brilliant |
| Outline | Square, cropped corners | Rectangular, cropped corners | Square, sharp corners |
| Sparkle | Low, broad bands | Low, broad bands | High, scattered |
| Window risk | High | High | Low |
| Forgives a bad cut | No | No | Partly |
The four corners are cropped into small flat facets rather than left sharp — structural, not decorative: it removes the point that would chip first. Unequal corners are the fastest way to spot a stone cut in a hurry.
Why it suits minimalism
An Asscher has no fire to compete with the design around it, so it works with settings that would overwhelm a brilliant: a plain wide band, a bezel with a knife edge, one baguette on each side. It also suits a wearer who wants something other than the default: a 2-carat round is everywhere; a 2-carat Asscher is a decision.
Less crowded than emerald cut
Most moissanite makers offer round, oval, princess, pear and emerald; Asscher is usually added last, if at all. The cutters who do produce it tend to specialize in step cuts, because a factory treating it as a side product turns out stones with obvious windows — smaller pool, higher average quality.
Fewer stones to compare also means you cannot shop on price alone: ask for a straight-on photo over text, a daylight video, and the depth percentage.
What to check before you buy
- Ratio of 1.00–1.05, measured rather than labeled.
- No window — the text test, at arm's length.
- Even steps — rows of equal width on all four sides.
- Symmetrical corners — four clipped corners of equal size.
- Centered culet — the small flat at the bottom sits under the table's center.
- Depth around 65–70 percent. Shallower invites a window; much deeper hides weight under the finger.
What we make
Our Asscher-cut moissanite is cut and set in our own factory in Wuzhou, running since 2008. Stones are D color and VVS1 with a GRA certificate; settings are 925 silver or 9K, 14K and 18K gold, mostly plain bands and bezels, because a step cut does not need decoration.
Prices run from $17 to $2,020, most pieces near $98. Free shipping over $99, $5.99 under it, 30-day returns on unworn items. If this is your first step cut, buy under 1.5 carats: the double refraction stays quiet.
