Difference between revisions of "Hessonite"

Latest revision as of 14:36, 20 December 2022

Hessonite

Description

A golden brown to red color Gemstone composed of calcium aluminum silicate with a small portion of Iron. Hessonite resembles yellow Zircon in color and both were called hyacinth in ancient times because they were found in the same gem-bearing gravels of Ceylon. Hessonite is softer than Quartz and less brittle than zircon and hence, was used in ancient engraved gems (Ogden 1982).

Raman (RASMIN)

Raman (U of Parma)

Synonyms and Related Terms

grossularite; cinnamon stone; essonite; mormoriom; hessenite; esonita (Esp.); Hessonit (Deut.)

Physical and Chemical Properties

Cubic crystal system with dodecahedron and trapezohedron habits
Luster = greasy to vitreous
Fracture = conchoidal or uneven
Cleavage = indistinct
Streak = brown
Fluorescence = inert to weak orange
Pleochroism = none
Dispersion = 0.028

Mohs Hardness	6.5 - 7.0
Density	3.64-3.69 g/ml
Refractive Index	1.70
Birefringence	none

Comparisons

Properties of Common Gemstones

Resources and Citations

Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
Wikipedia: Hessonite (Accessed Sept. 7, 2005 and Dec 2022)

@@ Line 2: / Line 2: @@
 == Description ==
-A golden brown to red color [http://cameo.mfa.org/materials/fullrecord.asp?name=gemstone gemstone] composed of [http://cameo.mfa.org/materials/fullrecord.asp?name=grossular grossular] (calcium aluminum garnet) which has a small portion of [http://cameo.mfa.org/materials/fullrecord.asp?name=iron iron]. Hessonite resembles yellow [http://cameo.mfa.org/materials/fullrecord.asp?name=zircon zircon] in color and both were called hyacinth in ancient times because they were found in the same gem-bearing gravels of Ceylon. Hessonite is softer than [http://cameo.mfa.org/materials/fullrecord.asp?name=quartz quartz] and less brittle than zircon and hence, was used in ancient engraved gems (Ogden 1982).
+A golden brown to red color [[gemstone]] composed of calcium aluminum silicate with a small portion of [[iron]]. Hessonite resembles yellow [[zircon]] in color and both were called hyacinth in ancient times because they were found in the same gem-bearing gravels of Ceylon. Hessonite is softer than [[quartz]] and less brittle than zircon and hence, was used in ancient engraved gems (Ogden 1982).
+[[[SliderGallery rightalign|HessonitegrossgarnetRS.jpg~Raman (RASMIN)|Hessoniteitaly1.jpg~Raman (U of Parma)]]]
 == Synonyms and Related Terms ==
 grossularite; cinnamon stone; essonite; mormoriom; hessenite; esonita (Esp.); Hessonit (Deut.)
+==Physical and Chemical Properties==
+* Cubic crystal system with dodecahedron and trapezohedron habits
+* Luster = greasy to vitreous
+* Fracture = conchoidal or uneven
+* Cleavage = indistinct
+* Streak = brown
+* Fluorescence = inert to weak orange
+* Pleochroism = none
+* Dispersion = 0.028
 {| class="wikitable"
 |-
 ! scope="row"| Mohs Hardness
-| 7
+| 6.5 - 7.0
 |-
 ! scope="row"| Density
-| 3.64-3.69
+| 3.64-3.69 g/ml
+|-
+! scope="row"| Refractive Index
+| 1.70
+|-
+! scope="row"| Birefringence
+| none
 |}
-== Additional Information ==
-J. Ogden, ''Jewelry of the Ancient World'', Rizzoli International Publications, New York, 1982.
-[[[SliderGallery rightalign|HessonitegrossgarnetRS.jpg~Raman|Hessoniteitaly1.jpg~Raman]]]
 == Comparisons ==
@@ Line 27: / Line 38: @@
 [[media:download_file_415.pdf|Properties of Common Gemstones]]
+==Resources and Citations==
+* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
-== Authority ==
+* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
-* Jack Odgen, Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
-* Random House, Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
 * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998
+* Wikipedia: [https://en.wikipedia.org/wiki/Grossular#Hessonite Hessonite] (Accessed Sept. 7, 2005 and Dec 2022)
-* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Hessonite (Accessed Sept. 7, 2005)
 [[Category:Materials database]]