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2. Lamprophyre - Wikipedia

   en.wikipedia.org/wiki/Lamprophyre

   They are usually dark in color, owing to the abundance of ferro-magnesian silicates, of high specific gravity and liable to decomposition. For these reasons they have been defined as a melanocrate series (rich in the dark minerals ); and they are often accompanied by a complementary leucocrate series (rich in the white minerals feldspar and ...

3. Inclusion (mineral) - Wikipedia

   en.wikipedia.org/wiki/Inclusion_(mineral)

   In mineralogy, an inclusion is any material trapped inside a mineral during its formation. In gemology , it is an object enclosed within a gemstone or reaching its surface from the interior. [ 1 ] According to James Hutton 's law of inclusions, fragments included in a host rock are older than the host rock itself.

4. Template:Infobox mineral - Wikipedia

   en.wikipedia.org/wiki/Template:Infobox_mineral

   Irrelevant for minerals without an extinction angle (isotropic, opaque, or amorphous minerals). length fast/slow Sign of elongation: length fast or length slow: fluorescence see fluorescence: absorption see absorption: melt melting point of mineral: Curie Curie temperature of mineral: fusibility fusibility of mineral: diagnostic key way to ...

5. Diamond inclusions - Wikipedia

   en.wikipedia.org/wiki/Diamond_inclusions

   The timing of mineral crystallization can be used to categorize diamond inclusions into three types: protogenetic, syngenetic, and epigenetic inclusions. [14] Minerals in the protogenetic inclusions were crystallized earlier than the diamond formation. The host diamond encapsulated pre-existing minerals during its crystallization.

6. Ultramafic rock - Wikipedia

   en.wikipedia.org/wiki/Ultramafic_rock

   Peridotite, a type of ultramafic rock. Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta-igneous rocks with a very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are usually composed of greater than 90% mafic minerals (dark colored, high magnesium and iron content).

7. Facing the holidays without family ties or the romantic ...

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   Get inspired by a weekly roundup on living well, made simple. Sign up for CNN’s Life, But Better newsletter for information and tools designed to improve your well-being. While the holiday ...