Sapphire, Feldspar and Phlogopite
| ID | 640 | |
|---|---|---|
| Mineral |
Sapphire
Feldspar Phlogopite |
|
| Location | Ianavoha - Fotadrevo - Atsimo-Andrefana, - Madagascar | |
| Fluorescence | LW-UV: check SW-UV: check |
|
| Mindat.org |
View Sapphire information at mindat.org View Feldspar information at mindat.org View Phlogopite information at mindat.org |
|
Mindat data
| ID | 3529 |
|---|---|
| Long ID | 1:1:3529:9 |
| Variety of | 1136 |
| Entry type | 2 |
| Colour | blue, yellow, green, brown, pink, purple |
| About the name |
According to Wikipedia: "Etymologically, the English word "sapphire" derives from French saphir, from Latin sapphirus, sappirus from Greek σαπφειρος (sappheiros) from Hebrew סַפִּיר (sapir), a term that probably originally referred to |
| ID | 1624 |
|---|---|
| Long ID | 1:1:1624:3 |
| Entry type | 5 |
| About the name | The name is derived from the German term 'Feldspat'. For centuries, miners generally referred to minerals and rocks as "Spat" if they had the property of being particularly easy to (completely) split. The perfection of cleavage was often evident from the existing, visible cleavage cracks and from the fact that fine flakes (“Spaten”) detached from the mineral or rock body when struck with a hammer. The term feldspar came into being around the middle of the 18th century when people in mineralogy learned to differentiate between the different types of minerals more precisely. There are various theories about the exact origin of this name. In 1783, for example, Urban Brückmann asked himself whether feldspar could have received its name based on its characteristic way of occurrence in the form of fields or patches in granite and other types of rock (never as entire veins, rocks, or mountains). René-Just Haüy, on the other hand, suggested in his 1804 work "Traité de minéralogie" that the name could have been chosen based on the fact that feldspar fragments were regularly found in the fields. The feldspar would therefore be understood as “spar from the fields” and an indication that feldspar gradually turned into arable soil through weathering. |
| shortcode_ima | Fsp |
| ID | 3193 |
|---|---|
| Long ID | 1:1:3193:2 |
| Formula |
KMg3(AlSi3O10)(OH)2
|
| IMA Status |
APPROVED GRANDFATHERED |
| Description | Mica Group. Biotite-Phlogopite Series. The hydroxyl analogue of Fluorophlogopite and the magnesium analogue of Hendricksite. Also, generally the micas on the Phlogopite end (magnesium end) of the Biotite-Phlogopite Series, including Phlogopite, Fluor... |
| Other Occurrences | Contact and regional metamorphic limestones and dolomites, ultramafic rocks. |
| Discovery Year | 1841 |
| Diapheny | Transparent,Translucent |
| Cleavage | on {0001} |
| Tenacity | flexible |
| Colour | Brown, gray, green, yellow, or reddish brown |
| Hardness (min) | 2.0 |
| Hardness (max) | 3.0 |
| Luminescence | None |
| Lustre | Vitreous - Pearly |
| About the name | Named in 1841 by Johann Friedrich August Breithaupt from the Greek φλογωποζ "phlogopos" for "resembling fire", in allusion to the red tint of the original specimens. |
| Streak | White |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Micaceous |
| Morphology | Six sided crystals, thick tabular to prismatic, commonly tapered. |
| Twinning | Composition plane {001}, twin axis [310] |
| Comment Luster | sub-metallic on cleavage |
| shortcode_ima | Phl |
Details
Price: € 300
Dimensions: None mm x None mm x None mm
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Al | Aluminium | |
| H | Hydrogen | |
| K | Potassium | |
| Mg | Magnesium | |
| O | Oxygen | |
| Si | Silicium |