What is the Average Lab Diamond Size?

Lab grown diamonds come in an array of shapes and lab diamond ring size guide. On average, lab diamonds measure 2.5 carats in weight – making them popular for princess cut pieces such as rings, earrings and other jewellery pieces.

When selecting a lab diamond, make sure it’s an exceptional stone with a GIA certificate. This will guarantee the stone is free from any inclusions and meets all your specifications.

1. Carat

On average, lab diamond engagement ring size guide range in size from one carat to two carats. As with naturally mined diamonds, the shape and size of a lab diamond play an important role when determining its price tag.

As with most things, the size of a one-carat lab diamond depends on its cut and clarity. For instance, a 1.00 carat lab created pear shaped diamond may appear larger than an equivalent natural emerald stone of the same weight.

Round diamonds tend to appear larger than they actually are due to their facets, which can mask their true size. Conversely, an emerald-shaped stone’s faceting may also conceal its diameter, making it appear bigger than a square-shaped diamond of similar weight.

Therefore, it’s wise to get a feel for how a diamond will appear on your finger before purchasing it. Doing so can help determine if the right size is suitable for you.

2. Clarity

Lab diamonds are man-made stones that look just like naturally mined diamonds, but can be cut and crafted into different sizes. These special sizes, also referred to as off-size lab diamonds, allow you to save money when purchasing an engagement ring.

They can be just 0.5 smaller or larger than traditional whole carat size, yet still man made. This allows you to get a stone that looks just as “fancy” as more costly counterparts with full carat weights.

These special sizes range in carat weight from.9 carats and up, though the exact amount can vary between rings. They’re an ideal option for those seeking a smaller carat weight and will save you hundreds of dollars on your engagement ring purchase.

Clarity of a lab diamond is just as essential as the other 3 C’s when purchasing one, so make sure you purchase an excellent stone free from inclusions or blemishes that could detract from its beauty.

  1. Colour

The hue of a diamond plays an integral role in its aesthetic appeal and beauty. But colour alone cannot fully capture all aspects of a diamond’s beauty; there are other 4 C’s (Cut, Clarity, Carat and Colour) which must all be taken into consideration for complete satisfaction.

Lab created diamonds are becoming a more and more popular sustainable alternative to mined diamonds due to their often lower costs and variety of colours.

Lab-grown diamonds offer the unique colour control of blue, pink, yellow, green and black that natural diamonds cannot offer. This trend is becoming increasingly popular with consumers who value environmental friendliness and ethics above all else.

Diamonds with visible colorations outside the D-Z grading range are classified as “Fancy Coloured.” Although not identical to natural diamonds, the distribution of Fancy coloured lab diamonds on the market is similar–yellow being the most common, though some rare blues and pinks also exist.

4. Shape

Lab created diamonds can be cut into a range of shapes, such as pear, oval and princess. These cuts offer a contemporary, modern aesthetic while being more cost effective than round diamonds with the same carat weight.

Pear-shaped lab diamonds are a timeless classic shape with their tapered point on one end. Plus, these lab created diamonds boast 58 facets for superior brilliance and colour dispersion.

The oval-shaped lab diamond is a popular shape that boasts brilliant brilliance and excellent colour dispersion. This gem boasts 57 to 58 facets and can be worn as an engagement ring or piece of jewellery.


Lab-grown yellow diamonds can range in colour from pale to intense, depending on how much nitrogen trace elements are present during growth. They may also appear orange or blue depending on which solvents were used during formation.


With a discerning eye and a penchant for depth, Erdmann crafts content that intrigues and informs. At, he navigates the intricacies of life, offering readers a compelling journey through thought and experience.

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