Encyclopedia Britannica
Encyclopedia Britannica
SUBSCRIBE
SUBSCRIBE
SUBSCRIBE TO PREMIUM
  • Home
  • Biographies
  • Animals & Nature
  • History & Society
  • Science & Tech
  • Geography & Travel
  • Arts & Culture
  • ProCon
  • Money
  • Games & Quizzes
  • Videos
  • Today in History
  • Dictionary
  • New Articles
Biographies
  • Browse Biographies
Animals & Nature
  • Birds, Reptiles & Other Vertebrates
  • Environment
  • Fossils & Geologic Time
  • Insects & Other Invertebrates
  • Mammals
  • Plants
History & Society
  • History
  • Philosophy & Religion
  • Politics, Law & Government
  • Society & Social Issues
Science & Tech
  • Health & Medicine
  • Science
  • Technology
Geography & Travel
  • Geography & Travel
Arts & Culture
  • Entertainment & Pop Culture
  • Literature
  • Sports & Recreation
  • Visual Arts
  • Image Galleries
  • Podcasts
  • Summaries
  • Top Questions
  • Lists and Stories
  • Britannica Kids
Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
triplet
References
Images
Illustration showing two types of assembled gems: a doublet with a top stone layer fused to an inferior stone or glass base, and a triplet with a colored material layer sandwiched between two stone layers. Key parts such as crown, girdle, and pavilion are labeled.
Britannica AI Icon

triplet

gem
Written by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.

The Information Architects of Encyclopaedia Britannica

Learn about this topic in these articles:

  • Assembled gems
    assembled gem

    Triplets consist of a crown of stone and a lower portion (not necessarily the whole pavilion) of stone, sandwiching a layer of foil or other material to give the stone the desired colour.

    Read More

    Triplets consist of a crown of stone and a lower portion (not necessarily the whole pavilion) of stone, sandwiching a layer of foil or other material to give the stone the desired colour.

    Read More