Opal Slice

There are several factors to consider in this decision, and we hope our guide on opal cuts aids in simplifying that choice for you.

Technical Considerations

For opals, the chosen cut significantly alters the gem’s appearance. Opals are unique among gemstones as they are frequently cut into distinctive shapes to maximize their play-of-color.

Clarity is generally the most crucial aspect of opal. It determines the number of inclusions within the stone. Opals range from completely transparent to opaque, with clarity influencing their value.

Cabochon Cutting

Cabochons are the most popular form for cutting opals. A cabochon is a gemstone polished into a round or oval shape, typically featuring convex faces and domes without cutting into the stone.

Most gemstones are faceted to allow light to pass through without resistance, and this method suits transparent opals best due to their vibrant play-of-color. However, most opals are quite opaque and thus are shaped into cabochons.

From Rough Opal to Opal Jewelry: Cutting Process

After selecting an opal that meets their requirements, the jeweler or buyer will rough cut it into a general shape. Opals are not very dense, so even larger ones can be worn comfortably in various settings.

Opal is quite sensitive to heat, so water is continuously applied during the cutting process to keep the stone cool. The final product’s clarity greatly determines its use. Opaque opals, without any treatment, are typically turned into beads for necklaces, while transparent, high-quality opals are set as centerpieces in rings or necklaces.

Natural Vs. Lab-Created Opal

Two main factors come into play when deciding between natural and lab-created opals. The first factor is affordability. Is your budget large enough for a natural opal, or would you prefer saving some money? If you lean toward the latter, a lab-created opal is probably the better choice.

Opals contain a lot of water and can become dehydrated over time, especially without proper maintenance. Dehydration can lead to crazing, where tiny fractures and cracks develop, making the gemstone more fragile and less beautiful. A smaller opal is less prone to this issue, so if you opt for natural opal but desire easier maintenance, choose a smaller stone.

Opal Cuts

Asscher Cut

An Asscher cut opal resembles an emerald cut but has a more square shape. Viewed from above, it looks like a perfect square with cut corners allowing more light to enter the stone.

Emerald Cut

The emerald cut is a classic style with clipped corners, forming an octagon-like shape. These cuts usually have rectangular facets that emphasize the stone’s parallel lines.

Baguette & Carre

The baguette cut is rectangular, with four corners shape creating a four-sided polygon. Its extended facets make it a great choice for a prominent stone in a piece.

The carre cut features four sharp corners angled at approximately 90 degrees.

Round

The round cut is circular and very popular because it lets in the most light, showcasing the opal’s play-of-color.

Oval

An oval cut opal, similar to a round cut but more elongated, is a wonderful choice for accentuating the play-of-color in a classic yet unique shape. Oval cuts can make the gemstone appear larger even if it shares the same weight.

Cushion

The cushion cut is a square shape with rounded corners, resembling a couch cushion or pillow when complete.

Princess

The princess cut is one of the most popular gemstone cuts, usually featuring 50 to 58 facets depending on the cutting style. It can include up to four chevron patterns visible when looking down at the gemstone.