How is Opal Valued?

Opal is a mesmerising, yet often misunderstood gemstone. Below, Opalily has put together a step-by-step guide for our clients to understand exactly how opal is valued, so that they can feel comfortable in knowing how their new heirloom gemstone holds its value.

 

Consider the Play-of-Color

The vibrant, play-of-colour sheen is what makes Australian opal gemstones so incredibly beautiful and unique. This is the shifting spectrum of colours that changes with the angle of view or light. Evaluate the brightness, range, and pattern of colours. Generally, opals with a brighter and more diverse play-of-colour are more valuable.

Examine the Brightness

Brightness refers to how vivid the play-of-colour is within the opal. The brightness scale ranges from brilliant to dull. The more brilliant an opal's color play, the more valuable it is considered.

Check for Clarity and Inclusions

Look for any visible inclusions or blemishes that might affect the opal's beauty or durability. However, some inclusions are considered acceptable depending on the type of opal.

Determine the Size and Shape

Opals are sold by weight (carats) and their size and shape can affect their use in jewelry. Consider what you’re looking for in terms of setting and style when choosing an opal's size and shape.

How Many Colours Are Visible

The range and balance of colors within the play-of-colour can significantly affect an opal's appeal and value. Red flashes are generally more valued than blue or green, but personal preference should guide your choice.

Assess the Body Tone

The body tone of an opal refers to the darkness or lightness of the stone excluding its play-of-colour. Black opals are the rarest and usually the most expensive due to their dark body tone which enhances the play-of-colour.

Cut and Finish

A well-cut opal will have a smooth surface with no scratches or pits. The cut should enhance the stone’s play-of-colour and ensure it sits well in jewelry.

Trust Your Aesthetic Preference

While technical characteristics can guide the value, choosing an opal is also a deeply personal decision. Trust your instincts and choose a stone that speaks to you, whether it's for its brilliance, colour combination, or simply its unique beauty.

Verify Authenticity and Source

Ensure you're buying from a reputable dealer who provides certifications for their gemstones. Knowing the opal's origin can also add to its value and desirability.

By considering these factors, you can choose an opal that not only holds value but also personal significance and beauty.