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Amethyst. Amethyst is a violet variety of quartz. The name comes from the Koine Greek αμέθυστος amethystos from α- a-, "not" and μεθύσκω ( Ancient Greek) methysko / μεθώ metho ( Modern Greek ), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [ 1]
Colored gold is the name given to any gold that has been treated using techniques to change its natural color. Pure gold is slightly reddish yellow in color, [ 1] but colored gold can come in a variety of different colors by alloying it with different elements. Colored golds can be classified in three groups: [ 2]
Diamond[ a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...
A mixture of other minerals, often including pyrite. Lapis lazuli ( UK: / ˌlæpɪs ˈlæz ( j) ʊli, ˈlæʒʊ -, - ˌli /; US: / ˈlæz ( j) əli, ˈlæʒə -, - ˌli / ), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.
Papal regalia and insignia. Official seal of the Holy See. [ 1] The crossed keys symbolise the keys of Simon Peter. The keys are gold and silver to represent the power of loosing and binding. The triple crown (the tiara) symbolizes the triple power of the Pope as "father of kings", "governor of the world" and "Vicar of Christ".
Mourning ring. A mourning ring is a finger ring worn in memory of someone who has died. [ 1] It often bears the name and date of death of the person, and possibly an image of them, or a motto. They were usually paid for by the person commemorated, or their heirs, and often specified, along with the list of intended recipients, in wills. [ 2]
Jet is a type of lignite, [ 1] the lowest rank of coal, and is a gemstone. Unlike many gemstones, jet is not a mineral, but is rather a mineraloid. [ 2] It is derived from wood that has changed under extreme pressure. The English noun jet derives from the French word for the same material, jaiet (modern French jais ), ultimately referring to ...
Mood ring. A mood ring is a finger ring that contains a thermochromic element, or "mood stone", that changes colors based on the temperature of the finger of the wearer. Finger temperature, as long as the ambient temperature is relatively constant, is significantly determined by peripheral blood flow, which is modulated by the autonomic nervous ...