18th Century Surgical Knife Set in Portable Shagreen Case

• Shagreen - Shagreen is the untanned smoothly pebbled textured skins of rays, sharks or dogfish. In finishing, it is dyed, mostly green, but the colour often fades to a cream colour. Shagreen was a popular material in Europe during the Art Deco era, when designers sought to mould the French tradition of luxury with exotic and precious materials. Most collectable items made from shagreen are smaller objects, like glasses cases, dagger and sword hilts, dressing accessories, boxes and picture frames.
• Tortoiseshell - Tortoiseshell is a translucent material that comes from the horny carapace of a certain types of turtles, including the hawksbill turtle. It is often therefore mounted on a colour underground - often red - or inlaid with gold or silver thread, as seen in Boulle furniture.
  
  The texture and colour nuances of the material are extremely important. Heated tortoiseshell can easily be formed into various shapes. Like other natural materials, tortoiseshell becomes more beautiful with use. In a time before plastic, tortoiseshell was widely used for small objects such as combs and powder compacts.
  
  In 1973, the trade of tortoiseshell worldwide was banned under CITES (The Convention on International Trade in Endangered Species). Prior to importing or exporting items containing tortoiseshell a CITES permit must be obtained. Tortoiseshell items cannot be traded on Ebay.
  
  "Faux tortoiseshell", another case of man initiating nature, is made from old-style plastics such as celluloid and cellulos and is coloured with red, yellow and brown spots to imitate the genuine article. It is commonly used in glasses frames, musical instruments and costume jewellery.

This item has been included into following indexes:

• doctor's / medical equipment 151
• shagreen items 118