Moonstone Oval Cabochons 10mm

Oval moonstone cabochon with AAA grade blue adularescence and a floating effect on 90% of the surface. Size between 8 and 10 mm on the long dimension, 4 mm thickness, flat back. The oval is the classic format for moonstone in rings and pendants: the symmetrical curve centers the flash at the point of maximum visibility and evenly distributes the effect over the entire dome. Selected in the lapidary wholesale market.

Piece Information

This specific piece

AAA adularescence classification indicates that the blue flash covers 90% or more of the surface under direct spot light and that the effect is visible from a wide viewing angle (not just perpendicularly). In this lot, the reflections range from soft silver to aquamarine blue depending on the angle of incidence; in several pieces, the flash moves with a "swimming" motion across the dome.

The lapidary decision was to maintain a thickness of 4 mm — more than typically used for standard cabochons — to enhance the depth of the adularescence effect. A thinner stone concentrates the flash but reduces the visual travel of the shimmer; 4 mm is the optimal balance for this mineral.

How adularescence forms

Adularescence is a light scattering phenomenon produced by alternating layers of orthoclase and albite that form during the slow cooling of igneous rock. Light penetrates these ultra-fine lamellae, disperses into blue-white spectrum wavelengths, and produces the characteristic floating glow. The blue color is an indicator of quality: finer lamellae generate more saturated blues.

What mounting works for

• Rings with oval bezel in 925 silver — the oval format is the most versatile for rings: it fits classic bezels, vintage-style settings, and contemporary designs. The 4 mm dome gives visual volume without exaggerating the side profile.
• Pendants with soldered bezel in silver — mounted in a simple oval pendant, the 8-10 mm cabochon is the perfect size for an everyday piece that is not excessive.
• Wire wrap — the oval is one of the most manageable shapes in wire wrap. The flat back ensures stability during the wrapping process.

Moonstone in lapidary tradition

Used in jewelry since the Hellenistic period, moonstone was called selenites in ancient Rome — from the Greek Selene, goddess of the moon — because lapidaries believed that the inner flash waxed and waned with the lunar phases.

In crystal tradition, moonstone is associated with intuition, natural cycles, and new beginnings. It is considered a stone of emotional clarity and connection to one's own rhythms. The symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice.

How to recognize genuine moonstone

Authentic moonstone shows a flash that appears to be inside the stone, not on the surface: when moving the stone under a pinpoint light source, the flash moves fluidly. Imitations made of opaline glass have a uniform and static glow.

Frequently Asked Questions

What does "AAA grade" in adularescence mean?

It indicates that the bluish flash covers 90% or more of the visible surface and is perceptible from a wide viewing angle, not just when the stone is perfectly perpendicular to the light source. It is the highest grade in the commercial classification of moonstone.

Is it suitable for everyday rings?

With 6-6.5 Mohs and two cleavage planes, moonstone can chip with strong side impacts. For everyday ring wear, we recommend a closed bezel and avoiding manual work while wearing the jewelry. For occasional use and earrings, there are no significant restrictions.

Is it treated?

No detectable treatment. Statement based on lapidary observation; the piece does not include formal gemological certification.

See also: complete cabochon collection.