Mark T Modern Cushion Diamonds

Designer & Cutter Yoram Finkelstein GemConcepts LTD.

Summary of Cut Design

This new design brilliance is controlled to allow a redirection of unobstructed facet light back to the viewer. Unobstructed viewing of the pavilion facets of a diamond are not common with traditional cushion brilliants because the pavilion facets are obstructed by light bouncing thus creating many virtual facets which display an array of tiny facets that minimize the size of the flashes redirected to the viewer.

This specific 3D precision and position of all facets angles on the present design function in harmony to localize and control the brilliance so that the viewer may enjoy an unobstructed view of light reflected from all of the pavilion facets.

The proportions of a cut diamond and the relationship between the various facets and angles are critical to creating the overall beauty of the diamond because they determine the extent to which a cut diamond achieves its optical potential. The stringent faceting angles of this present design are redesigned in order to successfully achieve a face up appearance which describes the optical goal.

Mark"T" Modern Cushion Brilliant

Detailed description of Facet Design

The light return of a conventional cushion brilliant has been framed in this present facet design by applying specific facet sizes, angles, and azimuths thereby controlling the light reflected from the pavilion and crown. By controlling these facets, angles and azimuths the light reflected to the viewer is drawn to an extraordinary spread of larger flashes of light shooting out of the diamond.

The pavilion of the current design has been further framed by cutting each of the EIGHT facet mains, SIXTEEN lower girdle facets and Culet to a stringent and specific angles, facet sizes and azimuth precision to achieve a balanced and even play of light throughout the entire visual area of the FACE,(crown and table). Further each of the eight crown mains, sixteen upper girdle facets and eight star facets are framed from the conventional crown and cut to the specific angles, facet sizes and azimuth precision to further enhance the optical properties that make the Diamond a Prized Optical Performer.

The Pavilion is cut to shallower angles when compared to standard brilliant pavilion angles and fits in perfect harmony with steeper crown angles, taller crown height and smaller table ( AKA "Royal Chandelier" Cushion Brilliant ) …….. The pavilion facet configuration and design is based on various light combinations and how the diamond catches and handles the light. The four corner pavilion mains and all sixteen lower girdle facets are specifically designed to capture light coming directly from the primary source that are displayed as Red when looking through an ASET scope. The remaining four pavilion main facets are cut purposely obstructed by the viewer, BLUE in the ASET creating the perfectly balanced contrasts (four arrows) which are plausible property and an integral part of the beauty of this diamond. The shallower angles of the pavilion are designed to play a critical role when the diamond is tilted or moving which naturally is a common occurrence as most of the time Diamonds are not in a parallel position to the viewer.

Figure 1- Face up view

When the diamond is rocking from side to side the four main obstructed pavilion facets (Blue Arrows) switch from being obstructed to catching primary light source displaying bright red in the ASET. (see figures 2,3 and 4) This cut was purposely designed to reflect the primary light source when tilted. When comparing with other Cushion Brilliant Cuts on the market, most will show significant leakage of light when tilted.

5 degree tilt

10 degree tilt

15 degree tilt



Based on our research of 4 plus years while perfecting this cushion, employing high crown heights and correctly applied crown angles will add significant fire and cause larger reflective fire flashes distributed throughout the crown area of the diamond. When the crown proportions are applied accurately a "sculptured" effect is created, a three dimensional visual of a "diamond cut" which is in our opinion a very important optical property (figure 5)


Figure 5- sculpture wire effect

Lastly the design incorporates a cut culet. There are a few functions a polished culet serves when purposely cut; one of them is being part of a visual design called the "Kozibe" effect, a reflected spread of the faceted culet visible through the eight main crown facets and the table meets. But more importantly it's a durability feature; pointed culets are proned to chipping and would require a recut of the diamond. Due to the high precision of this Cushion Cut this will be in no way be a simple retouching of the chipped diamond such as other conventional cuts would allow. Thirdly, a polished culet is indeed a sign of craftsmanship, the visual symmetry of a faceted culet will easily reveal the overall precision and passion of this CUT.

View The Mark"T" Modern Cushion Selections


Author, Mark Turnowski G.G.
Designer &Cutter, Yoram Finkelstein, Gem Concepts Ltd.

Thank you,
The Staff at