Largest natural black star sapphire

The largest natural black star sapphire in the world has made its mark in history with its massive size and unique beauty. It weighs an impressive 3621.35 carats. This extraordinary star sapphire gem was found in Beruwala, Sri Lanka. It was officially recognized by Guinness World Records as the largest natural black star sapphire on January 5, 2024.

This remarkable gemstone is called The Black Star of Eva. It has dimensions of 101.43 mm in length, 72.74 mm in width, and 41.20 mm in height, with a circumference of 28 cm. These measurements make it not only the largest black star sapphire. But, it is also a rare and fascinating specimen in the world of gemstones.

The sapphire has a striking greyish-black color, which is typical of black star sapphires. One of its most defining features is its silvery asterism, or star-like effect, visible on its surface. This star pattern is caused by the reflection of light off inclusions within the stone, which creates a unique, shining star. The start effect comes from six rays. The sapphire has been cut into a cabochon shape, which enhances the star effect.

What is a Star Sapphire?

A star sapphire is a special type of sapphire that displays a star-shaped pattern on its surface. This effect, known as asterism, occurs due to inclusions within the stone, usually made of a ray pattern. When light hits the surface of the sapphire, these inclusions reflect the light in a way that creates a star-like shape. Star sapphires can come in different colors, including blue, yellow, and black, but the black variety, like The Black Star of Eva, is especially striking due to its dark hue and powerful star effect.

Declaimer: This record may break from time to time, but it is based on the most recent information related to Sri Lanka’s Guinness World Records.