The art of diamond cutting saw considerable advancements in the late 1800s. The primitive cutting methods that created rose cut diamonds gave way to more sophisticated methods that produced what we now refer to as "old cut" diamonds. With the use of motorised and steam-driven tools, cutters could accurately shape diamonds using these more recent techniques. Diamonds during this time were more brilliant than ever before thanks to modifications to the number, placement, and proportions of facets.
The characteristics of an old cut diamond include a round outline, fair symmetry, a high crown, a small table, circular girdle, large facets, and usually a flat and polished culet. Their tendency for deeply cut proportions also gives them the appearance of being thicker than round brilliant cuts.
It's critical to remember that round brilliants are cut in a way that allows light to enter the diamond and bounce out again when contrasting old cut diamonds with them. As a result, the effect of bright white brilliance that most people associate with diamonds is created. Old cut diamonds have a shine that is richer and warmer, almost glowing, and instead of reflecting light back out, it attracts the eye into the stone. Because of this, antique cut diamonds shine in candlelight and other dimly lit environments.