The Neelanjali Ruby, at 1,370 carats (274 g), is the world's largest double-star ruby

Ruby

A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum . The red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires...

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A ruby is known as a star ruby if it contains an asterism

Asterism (gemmology)

Asteria, or star stone is a name applied to ornamental stones that exhibit a luminous star when cut en cabochon. The typical asteria is the star-sapphire, generally a bluish-grey corundum, milky or opalescent, with a star of six rays...

 (distinctive star-shaped light refraction) in the gem. The Neelanjali Ruby is the world's largest star ruby with a 12 point asterism, which is commonly denoted as a double-star ruby. The ruby belongs to G. Vidyaraj and is reported to be in Bangalore

Bangalore

Bengaluru , formerly called Bengaluru is the capital of the Indian state of Karnataka. Bangalore is nicknamed the Garden City and was once called a pensioner's paradise. Located on the Deccan Plateau in the south-eastern part of Karnataka, Bangalore is India's third most populous city and...

, India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

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