Identification Material Prints 
WorthPoint
MARCH 29, 2024
Once these materials were processed into malleable materials, they were pressure molded, or blow-molded, into consumer goods until around 1950. Some celluloid was made to imitate natural materials like ivory or horn. Jewelry and hair combs were both made using these materials. WorthPoint—Discover. Preserve.
WCG
MAY 21, 2024
The Manager oversees all activities related to the care and documentation of the museum´s objects consisting of textiles, metal, and other materials, as well as a vast collection of printed materials contained in the archives. Packs and ships objects and documents. Contributes to budgetary and narrative project reports.
WorthPoint
SEPTEMBER 24, 2024
One caution is to watch for pieces of jewelry purported to be Haskell designs when they’re not since identification mistakes often happen in this branch of jewelry collecting. Many companies used those chains and similar dangles made with glass beads or natural materials to fashion jewelry during that period. WorthPoint—Discover.
Invaluable
OCTOBER 2, 2024
Pietro Andrea Mattioli – 4 folios from “Commentaries on the Six Books of Pedacius Dioscorides Anazarbeus on Medical Material,” 1565. Sold for £14,400 GBP via Sotheby’s (July 2005). Sold for $60 USD via Ripley Auctions (February 2024).
WorthPoint
APRIL 8, 2024
Rather than mouth-blowing the glass into a desired shape, the molten material was blown into a mold, making the job easier. You can also look for marks on both these types of glass to help with identification, as some companies specialized in cut glass while others were known for pressed glass. WorthPoint—Discover. Preserve.
Art Advisor's Blog
JULY 11, 2019
You can search by location or by type of material to be appraised. This sort of appraiser would need certification from GIA or one of the other jewelry organizations to qualify since identification of various precious stones is a requirement. Each of these has a website with a “Find an Appraiser” tab.
Fine Art Estates
JANUARY 7, 2022
If it is a fine print by a well-known artist, it is likely that you may find another impression of the same print that has been auctioned previously. This is the only database of the four that includes limited edition (reproductive) prints in addition to fine prints.
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