Difference between revisions of "Shell"

From CAMEO
Jump to navigation Jump to search
Line 37: Line 37:
  
 
==Resources and Citations==
 
==Resources and Citations==
 
+
* Gem Identification Lab Manual, Gemological Institute of America, 2016.
 
* Oppi Untracht, ''Jewelry Concepts and Technology'', Doubleday & Co., Inc., New York City, 1985
 
* Oppi Untracht, ''Jewelry Concepts and Technology'', Doubleday & Co., Inc., New York City, 1985
 
 
* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
 
* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982
 
 
* A.Lucas, J.R.Harris, ''Ancient Egyptian Materials and Industries'', Edward Arnold Publishers Ltd., London, 4th edition, 1962
 
* A.Lucas, J.R.Harris, ''Ancient Egyptian Materials and Industries'', Edward Arnold Publishers Ltd., London, 4th edition, 1962
 
 
* Art and Architecture Thesaurus Online, http ://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
 
* Art and Architecture Thesaurus Online, http ://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
  

Revision as of 12:35, 16 December 2022

Conch shell trumpet
MFA# 1988.1214

Description

Mask with shells
MFA# 1994.420

The hard outer covering or case of an animal, mollusk, insect, nut, or egg.

For more information see Eggshell, Seashell, Oyster shell, Tortoiseshell, and Walnut shell.

Synonyms and Related Terms

shells; seashell; tortoiseshell; eggshell; coquille (Fr.)

FTIR (MFA)

Aragonite 2.TIF

Raman (MFA)

Aragonite (HU Min. Museum 116189), 50X, 785 nm copy.tif

Chemical structure

Aragonite.jpg


Risks

  • No significant hazards.
  • ThermoFisher: SDS

Physical and Chemical Properties

  • Reacts with acids to evolve carbon dioxide.
  • Aragonite is harder and denser than calcite
  • Fracture = uneven to splinter
  • Luster = greasy or pearly
  • Streak = white
  • Fluorescence = variable
  • Birefringence = strong (0.155) showing interference colors
  • Straight extinction
Mohs Hardness 3.5 - 4.0
Density 2.93-2.95 g/ml
Refractive Index 1.530 - 1.686

Resources and Citations

  • Gem Identification Lab Manual, Gemological Institute of America, 2016.
  • Oppi Untracht, Jewelry Concepts and Technology, Doubleday & Co., Inc., New York City, 1985
  • Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
  • A.Lucas, J.R.Harris, Ancient Egyptian Materials and Industries, Edward Arnold Publishers Ltd., London, 4th edition, 1962
  • Art and Architecture Thesaurus Online, http ://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000

Retrieved from "https://cameo.mfa.org/index.php?title=Shell&oldid=95022"