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The karambit or kerambit (as used in Indonesian), kurambik or karambiak (both from the Minangkabau language) is a small curved knife resembling a claw. It is most closely associated with the Minangkabau people of West Sumatra , Indonesia , but is also found throughout other ethnic groups in Southeast Asia .
Females: The upper forewing has a yellow discal patch above the blue area. The upper hindwing blue area is small and reduced to discal quadrate spots in 3 and 4. The females resemble those of the common gem (P. hewitsoni) but with yellow spots on the upper hindwing. The males of the blue gem are bluer than the common gem which is greener. [4]
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.
Pattern welding is a practice in sword and knife making by forming a blade of several metal pieces of differing composition that are forge-welded together and twisted and manipulated to form a pattern. [1]
Ammolite is also known as aapoak (Kainah for "small, crawling stone"), gem ammonite, calcentine, and korite. The latter is a trade name given to the gemstone by the Alberta-based mining company Korite. Marcel Charbonneau and his business partner Mike Berisoff were the first to create commercial doublets of the gem in 1967. They went on to form ...
The best documented of the illumination tales is that of the King of Ceylon's luminous carbuncle or ruby, first mentioned by the Greek traveler Cosmas Indicopleustes in the 6th century and thereafter described by many travelers, the latest of the 17th century. According to Indicopleustes, it was "as large as a great pine-cone, fiery red, and ...
Sri Lanka’s gem industry has a very long and colorful history. Sri Lanka was affectionately known as Ratna-Dweepa which means Gem Island. The name is a reflection of its natural wealth. Marco Polo wrote that the island had the best sapphires, topazes, amethysts, and other gems in the world. [1]
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]