Azərbaycanca
Беларускі
Dansk
Deutsch
Española
Français
Indonesia
Italiana
日本語
Қазақ
Lietuvos
Nederlands
Português
Русский
සිංහල
แบบไทย
Türkçe
Українська
中國人
United State
Afrikaans
| තෝරමල්ලි | |
|---|---|
 Bi-colored tourmaline crystal, 0.8 අඟල් (2 cm) long | |
| General | |
| Category | |
| (Ca,K,Na,[])(Al,Fe,Li,Mg,Mn)3(Al,Cr, Fe,V)6 (BO3)3(Si,Al,B)6O18(OH,F)4 | |
| Identification | |
| පාට / පැහැය | Most commonly black, but can range from brown, violet, green, pink, or in a dual-colored pink and green. |
| Parallel and elongated. Acicular prisms, sometimes radiating. Massive. Scattered grains (in granite). | |
| Indistinct | |
| Uneven, small conchoidal, brittle | |
| hardness | 7–7.5 |
| Vitreous, sometimes resinous | |
| White | |
| 3.06 (+.20 -.06) | |
| 2.82–3.32 | |
| Polish luster | Vitreous |
| Optical properties | Double refractive, uniaxial negative |
| nω=1.635–1.675, nε=1.610–1.650 | |
| -0.018 to -0.040; typically about .020 but in dark stones it may reach .040 | |
| typically moderate to strong Red Tourmaline: Definite; dark red,light red Green Tourmaline: Strong; dark green, yellow-green Brown Tourmaline: Definite; dark brown, light brown Blue Tourmaline: Strong; dark blue, light blue | |
| .017 | |
| Ultraviolet | pink stones—inert to very weak red to violet in long and short wave |
| a strong narrow band at 498 nm, and almost complete absorption of red down to 640nm in blue and green stones; red and pink stones show lines at 458 and 451nm as well as a broad band in the green spectrum | |
- , GIA Gem Reference Guide 1995,
- Mindat tourmaline group Accessed September 12, 2005. This website details specifically and clearly how the complicated chemical formula is structured.
විකිපීඩියාව, විකි, සිංහල, පොත, පොත්, පුස්තකාලය, ලිපිය, කියවන්න, බාගන්න, නොමිලේ, නොමිලේ බාගන්න, mp3, වීඩියෝ, mp4, 3gp, jpg, jpeg, gif, png, පින්තූරය, සංගීතය, ගීතය, චිත්රපටය, පොත, ක්රීඩාව, ක්රීඩා., ජංගම දුරකථන, android, ios, apple, ජංගම දුරකථන, samsung, iphone, xiomi, xiaomi, redmi, honor, oppo, nokia, sonya, mi, පීසී, වෙබ්, පරිගණකය
ත රමල ල Bi colored tourmaline crystal 0 8 අඟල 2 cm longGeneralCategory Ca K Na Al Fe Li Mg Mn 3 Al Cr Fe V 6 BO3 3 Si Al B 6O18 OH F 4Identificationප ට ප හ යMost commonly black but can range from brown violet green pink or in a dual colored pink and green Parallel and elongated Acicular prisms sometimes radiating Massive Scattered grains in granite IndistinctUneven small conchoidal brittlehardness7 7 5Vitreous sometimes resinousWhite3 06 20 06 2 82 3 32Polish lusterVitreousOptical propertiesDouble refractive uniaxial negativenw 1 635 1 675 ne 1 610 1 650 0 018 to 0 040 typically about 020 but in dark stones it may reach 040typically moderate to strong Red Tourmaline Definite dark red light red Green Tourmaline Strong dark green yellow green Brown Tourmaline Definite dark brown light brown Blue Tourmaline Strong dark blue light blue 017Ultravioletpink stones inert to very weak red to violet in long and short wavea strong narrow band at 498 nm and almost complete absorption of red down to 640nm in blue and green stones red and pink stones show lines at 458 and 451nm as well as a broad band in the green spectrum GIA Gem Reference Guide 1995 ISBN 0 87311 019 6 Mindat tourmaline group Accessed September 12 2005 This website details specifically and clearly how the complicated chemical formula is structured