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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.
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 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.
On History Channel's hit show "Pawn Stars," a man came in to sell a 1907 Saint-Gaudens double eagle $20 gold coin. The coins are extremely rare, and some of them have sold for more than $1 million ...
The Numismatic Museum of Athens (Greek: Νομισματικό Μουσείο Αθηνών) is one of the most important museums in Greece and it houses a collection of over 500,000 coins, medals, gems, weights, stamps and related artefacts from 1400BC to modern times. [1]
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.
A woman in Poland found a unique stone in a field and kept it. Over 50 years later, archaeologists got their first look at the stone — and identified it as a rare ancient artifact.