Difference between revisions of "Template:Aquamarine"

From The Gemology Project
Jump to: navigation, search
 
(4 intermediate revisions by 3 users not shown)
Line 3: Line 3:
 
! colspan=2 | Aquamarine
 
! colspan=2 | Aquamarine
 
|-
 
|-
| Chemical composition || Beryllium Aluminium Silicate Be<sub>3</sub>Al<sub>2</sub>(SiO<sub>3</sub>)<sub>6</sub>
+
| Chemical composition || Be<sub>3</sub>Al<sub>2</sub>(SiO<sub>3</sub>)<sub>6</sub> Beryllium aluminum silicate
 
|-
 
|-
 
| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]]
 
| Crystal system || [[Crystals_&_Their_Structure#Hexagonal_Crystal_System | Hexagonal]]
 
|-
 
|-
| Habit || prismatic
+
| Habit || Prismatic
 
|-
 
|-
| Cleavage || imperfect, basal
+
| Cleavage || Imperfect, basal, almost never seen
 
|-
 
|-
| Hardness || 7.5
+
| Hardness || 7.5 to 8
 
|-
 
|-
| Optic nature || uniaxial -
+
| Optic nature || Uniaxial -
 
|-
 
|-
| Refraction index || 1.570 - 1.585
+
| Refractive index || 1.577-1.583 <br> (+0.017, - 0.017)
 
|-  
 
|-  
| Birefringence || 0.005-0.006
+
| Birefringence || 0.005-0.009
 
|-
 
|-
| Dispersion || low, 0.014
+
| Dispersion || Low, 0.014
 
|-  
 
|-  
| Specific gravity || 2.68-2.72
+
| Specific gravity || 2.72 <br>(+0.18,-0.5)
 
|-
 
|-
 
| Lustre || Vitreous
 
| Lustre || Vitreous
 
|-
 
|-
| Pleochroism || weak to distinct
+
| Pleochroism || Weak to moderate
 
|}
 
|}

Latest revision as of 11:53, 24 December 2006

Aquamarine
Chemical composition Be3Al2(SiO3)6 Beryllium aluminum silicate
Crystal system Hexagonal
Habit Prismatic
Cleavage Imperfect, basal, almost never seen
Hardness 7.5 to 8
Optic nature Uniaxial -
Refractive index 1.577-1.583
(+0.017, - 0.017)
Birefringence 0.005-0.009
Dispersion Low, 0.014
Specific gravity 2.72
(+0.18,-0.5)
Lustre Vitreous
Pleochroism Weak to moderate