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The ideal grade, called "Deep Siberian", has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source) red secondary hues. [7] ". Rose de France" is defined by its markedly light shade of the purple, reminiscent of a lavender / lilac shade.
In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form of this stone, valued for its appearance, but other colours of decorative porphyry are also used such as "green", "black" and "grey". [1] [2] The term porphyry is from the Ancient Greek πορφύρα ( porphyra ), meaning "purple".
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.
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.
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6( PO 4)4( OH)8·4 H 2 O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
Tyrian purple ( Ancient Greek: πορφύρα porphúra; Latin: purpura ), also known as royal purple, imperial purple, or imperial dye, is a reddish- purple natural dye. The name Tyrian refers to Tyre, Lebanon, once Phoenicia.
It is a mixture of amethyst and citrine with zones of purple and yellow or orange. Almost all commercially available ametrine is mined in Bolivia. The colour of the zones visible within ametrine are due to differing oxidation states of iron within the crystal.
Jadeite's color commonly ranges from white through pale apple green to deep jade green but can also be blue-green (like the recently rediscovered "Olmec Blue" jade ), pink, lavender and a multitude of other rare colors.
As a result of this phenomenon, a multitude of colors have been observed in various specimens: shades of purple, violet, indigo, blue, cyan, green, yellow, orange, red and brown. After heating, tanzanite becomes dichroic. The dichroic colours range from violet through bluish-violet to indigo and violetish-blue to blue.
The turquoise gemstone is the namesake for the color. Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 ( P O 4) 4 (O H) 8· 4 H 2 O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its ...