John F. Davis, Jr., born in 1924
Ring
United States, Massachusetts, (Boston), about 1950
14 k gold; topaz (1); tourmaline (2)
H. 2.5 cm; w. 2.5 cm
Museum of Fine Arts, Boston: Gift in memory of John F. Davis, Sr. 2002.404

for more information see:
MFA Online Collections Database

 

Topaz

Topaz.
Image credit: Minerals and Materials Photo Gallery.
Image accessed Oct.30, 2004 at Minerals in Your World

 

Synthetic blue topaz

Synthetic stone. Image credit: Raman Spectra Database of Minerals and Inorganic Materials (RASMIN) at http://www.aist.go.jp/RIODB/rasmin/E_index.htm

 

Raman spectrum of topaz

Raman spectrum of mineral collected at 514.5 nm (Ar+ laser, 300 mW power). Credit: Raman Spectra Database of Minerals and Inorganic Materials (RASMIN) at http://www.aist.go.jp/RIODB/rasmin/E_index.htm

 

Raman spectrum of topaz

Raman spectrum of natural crystals in random orientation using a micro Raman instrument with a He-Ne laser (632.8 nm excitation wavelength). Credit: Physics Department of the University of Parma at http://www.fis.unipr.it./~bersani/raman/raman/spettri.htm