Kiwi Opal Egg Natural Green Opal Stone Madagascar Genuine Crystal Specimen

Overview & Authenticity

Presented here is a genuine Kiwi Opal egg crafted from natural opal sourced in Madagascar. This is a carefully chosen specimen, selected for colour balance, surface quality, and overall visual appeal. The photographs show the actual specimen you will receive, ensuring complete transparency and confidence when purchasing.
Each piece is supplied with a Certificate of Authenticity, including a lifetime guarantee of genuineness, provided on a generic authenticity card. This confirms that the stone is a real, naturally occurring opal and not a synthetic or imitation material.

Material Identification – Kiwi Opal

Kiwi Opal, sometimes referred to as Madagascar Green Opal, is a naturally occurring variety of common opal composed primarily of hydrated silica. It is recognised for its distinctive soft green base colour interspersed with darker speckling or mottling, often black or deep green, which gives the stone its kiwi-like appearance.
Unlike precious opal, kiwi opal does not display play-of-colour. Instead, its appeal lies in its consistent colouring, organic patterns, and smooth polish, making it highly popular for decorative carvings and display pieces.

Geological Origin & Formation

Opal forms through the deposition of silica-rich solutions within fractures, cavities, and porous zones of host rock. Over time, as water evaporates or conditions change, silica precipitates and solidifies into opal.
In Madagascar, opal deposits are associated with volcanic and sedimentary geological environments where silica-bearing fluids were able to circulate and settle over extended geological timescales. The green coloration seen in kiwi opal is attributed to trace mineral inclusions within the silica structure, giving each specimen its unique tone and pattern.
This slow natural process results in stones that are both geologically interesting and visually calming, with no two examples ever exactly alike.

Form & Craftsmanship – Egg Shape

This specimen has been shaped and polished into a classic egg form, a shape long associated with balance, renewal, and natural harmony. The egg shape enhances the stone’s natural colour distribution, allowing the mottled green and darker inclusions to flow smoothly across the surface.
The polish highlights the opal’s subtle translucency and soft lustre while preserving the stone’s natural character. Full sizing details are provided in the accompanying photographs.

Physical Characteristics & Visual Features

The surface of this kiwi opal egg is smooth and well-finished, with a gentle sheen typical of common opal. The colour palette ranges from pale to mid green, contrasted by darker inclusions that add depth and visual interest. These features are entirely natural and formed during the stone’s geological development.
As opal contains water within its structure, it has a softer hardness than many crystalline minerals, contributing to its smooth feel and organic appearance.

Collecting & Display Appeal

Kiwi opal eggs from Madagascar are sought after for their decorative appeal and natural uniqueness. This specimen is ideal for display cabinets, shelves, desks, or crystal collections, where its soothing green tones can be fully appreciated. It also makes a thoughtful and distinctive gift for collectors, crystal enthusiasts, or anyone with an interest in natural stones.
As a genuine Madagascar kiwi opal supplied with a Certificate of Authenticity and lifetime guarantee, this carefully selected egg represents a visually striking and geologically meaningful addition to any mineral or crystal collection.