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Asterism on the surface of a blue star sapphire. A purple-pink star sapphire displaying asterism in a platinum ring.. An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone.
Heliophorus epicles, commonly known as the purple sapphire, is a species of lycaenid or blue butterfly found in Asia. [1] The species was first described by Jean Baptiste Godart in 1823. Subspecies
The name sapphire is derived from the Latin word sapphirus, itself from the Greek word sappheiros (σάπφειρος), which referred to lapis lazuli. [2] It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.
Mapping Ancient Athens is a project by a Greek non-profit Dipylon, launched in 2021, that aims to map and provide an interactive digital portal to explore the archaeological remains and historical data from more than 1500 rescue excavations conducted across Athens over the past 160 years. The project created a searchable map interface that ...
The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. [1] The term has largely fallen out of use. The five traditional cardinal gems are: amethyst (purple) – Rare and precious in the Old World until large deposits were found in Brazil. diamond (transparent)
The Harpole Treasure was discovered in 2022, and refers to a collection of valuable relics unearthed from a burial ground in England. Among the finds was a unique piece of jewelry.
Sapphires are a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide (α-Al 2 O 3) with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.
The “incredibly rare” lump was unearthed at a 1,700-year-old bathhouse in the United Kingdom. ‘Mysterious’ purple lump found at ancient Roman ruins was once ‘worth more than gold’ Skip ...