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HaŁyne  (HaŁynite)
Current inventory:  0 gems
 

HaŁyne

  
HaŁyne is named after Renť Just HaŁy (1743-1822), French pioneer in crystallography.

Discovered in 1807; IMA status: Valid (pre-IMA; Grandfathered)

 

Chemistry

 

 

Chemical Formula:

(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2

 

Sodium Calcium Aluminum Silicate Sulfur Sulfate Chloride

Molecular Weight:

1,032.43 gm

Composition:

Sodium

8.91 %

Na

12.01 %

Na2O

 

Calcium

7.76 %

Ca

10.86 %

CaO

 

Aluminum

15.68 %

Al

29.63 %

Al2O3

 

Silicon

16.32 %

Si

34.92 %

SiO2

 

Sulfur

9.32 %

S

 

 

 

Chlorine

1.72 %

Cl

1.72 %

Cl

 

 

-  %

Cl

-0.39 %

-O=Cl2

 

Oxygen

40.29 %

O

 

 

 

 

100.00 %

 

96.50 %

= TOTAL OXIDE

 

 

Classification

   

   

Mineral Classification:

Silicates (Germanates)

Strunz 8th Ed. ID:

8/J.11-30

Nickel-Strunz 10th Ed. ID:

9.FB.10

 

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H
2O
B : Tektosilicates with additional anions

Related to:

Sodalite Group.

Members of Group:

Sodalite Group: HaŁyne, Lazurite, Nosean, Sodalite, Tsaregorodtsevite, Tugtupite, Vladimirivanovite

Varieties:

None

Synonyms:

Auina, Berzeline (of Necker), Hauynite, Marialite (of Ryllo)

 

 

Crystal Data

   

   

Crystallography:

Isometric - Hextetrahedral

Crystal Habit:

Crystals are dodecahedra or pseudo-octahedra, to 3 cm; in rounded grains.

Twinning:

On {111}, common, rarely as penetration twins; also as polysynthetic or contact twins.

 

 

Physical Properties

   

 

Cleavage:

Distinct on {110}

Fracture:

Irregular/Uneven to Conchoidal

Tenacity:

Brittle

Moh's Hardness:

5.0 - 6.0

Density:

2.40 - 2.50 (Eifel: 2.40) (g/cm3)

Luminescence:

May show reddish orange to purplish pink fluorescence under LW UV.

Radioactivity:

Not Radioactive

 

 

Optical Properties

   

   

Color:

Bright blue to greenish blue; white or shades of black, gray, brown, green, yellow, red, may be patchy; colorless or pale blue in thin section.

Transparency:

Transparent to Translucent

Luster:

Vitreous to Greasy

Refractive Index:

1.494 - 1.509 (Eifel: 1.502)  Isotropic; weakly birefringent when included

Birefringence:

0.000 (Isotropic)

Dispersion:

0.008

Pleochroism:

None

 

 

Occurances

   

   

Geological Setting:

In phonolites and related leucite- or nepheline-rich igneous rocks; less commonly in nepheline-free extrusives.

Common Associations:

Andradite, Apatite, Augite, Biotite, Leucite, Nepheline, Melilite, Phlogopite, Sanidine, Titanian.

Common Impurities:

None

Type Locality:

Lake Nemi, Alban Hills, Rome Province, Latium, Italy

Year Discovered:

1807

View mineral photos:

HaŁyne Mineral Photos and Locations

 

 

More Information

   

   

 

Mindat.org
Webmineral.com

 

 


HaŁyne, also known as HaŁynite,
is a member of the Sodalite Group of minerals that includes HaŁyne, Lazurite, Sodalite and Tugtupite. HaŁyne is also considered to be a Feldspathoid. Minerals with chemistries that are close to those of the alkalai Feldspars, but are poor in silica (SiO2) content, are called Feldspathoids. HaŁyne has one of the most intense and beautiful blue colors in the gem world. It is one of the major constituents of Lapis Lazuli and accounts for the intense blue in Lapis. Faceted gems are rare and are always very small. Although HaŁyne is found in several localities around the world, the Eifel region of West Germany is the only major source of gem quality material.

Distribution: In Italy, in Lazio, at many localities in the Alban Hills, as at Ariccia, Marino, Sacrofano, and Campagnaro; on Monte Somma, and near Melfi, on Monte Vulture, Campania; in the Pitigliano quarry, near Grosseto, Tuscany. From Mendig, Mayen, and elsewhere in the Eifel district, Germany. In the USA, from Winnett, Petroleum County, Montana, and in the Edwards mine, St. Lawrence County, New York. In the Niangniang Shan complex, Nanjing, Jiangsu Province, China. On the smaller island of Taiarupu, Tahiti. A few other minor localities are known.
 

  
HaŁyne
gems for sale:

Hauyne-001

Gem:

HaŁyne

Stock #:

HAUYN-001

Weight:

0.3495 ct

Size:

4.60 x 3.26 mm

Shape:

Round

Color:

Blue

Clarity:

Eye Clean

Origin:

Eifel Mtns., Germany

Treatment:

None (natural)

Price:

SOLD  (but we have others)

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Hauyne-001

If you've seen a good sized Hauyne gem, you know how amazing the color is. My pictures do not do justice to this incredible gem. This is one of the most intense blue gems ever! A Hauyne this size is very rare. A Hauyne this size and eye clean is extremely rare!


Hauyne-002

Gem:

HaŁyne

Stock #:

HAUYN-002

Weight:

0.5290 ct

Size:

5.60 x 4.44 x 3.85 mm

Shape:

Oval

Color:

Light Blue

Clarity:

Eye clean (VS2 under loupe)

Origin:

Eifel Mtns., Germany

Treatment:

None (natural)

Price:

SOLD  (but we have others)

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Hauyne-002

Another beautiful Hauyne, but even larger! This gem is very large for Hauyne. It's a little lighter than most Hauyne gems (not quite as light as the pictures show), but the size and clarity make this an extremely rare gem!


Hauyne-003

Gem:

HaŁyne

Stock #:

HAUYN-003

Weight:

0.1025 ct

Size:

3.56 x 3.49 x 1.52 mm

Shape:

Rounded Trillion

Color:

Blue

Clarity:

Eye clean (VVS2 under loupe)

Origin:

Eifel Mtns., Germany

Treatment:

None (natural)

Price:

SOLD  (but we have others)

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Hauyne-003

Another beautiful Hauyne that is eye clean and has ideal color.


Hauyne-005

Gem:

HaŁyne

Stock #:

HAUYN-005

Weight:

0.1055 ct

Size:

3.34 x 3.30 x 1.73 mm

Shape:

Rounded Trillion

Color:

Blue

Clarity:

Eye clean (VVS2 under loupe)

Origin:

Eifel Mtns., Germany

Treatment:

None (natural)

Price:

SOLD  (but we have others)

Pictures are of the actual gem offered for sale.
Gem images are magnified to show detail.

Hauyne-005

Another beautiful Hauyne that is eye clean and has ideal color.


 


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