Cut from a single piece of quartz. Length 7.8 cm. Original case included.
W.A. Bolin Collection
W.A. Bolin 200 years, 'Smycken & Silver för tsarer, drottningar och andra', Stockholm 1996, catalogue no 26.
The Armoury Museum, the Kremlin, Moscow, 2001 ‘W.A. BOLIN Bolin in Russia Court jeweller late XIX-early XX centuries’, catalogue no 122, p. 174.
Magdalena Ribbing et al., 'Jewellery & Silver - for Tsars, Queens, and Others, W.A. Bolin 200 Years', Västerås 1996, illustrated and mentioned at p. 63.
Ed. Christian Bolin, Pavel Bulatow, 'W.A. BOLIN Bolin in Russia Court jeweller late XIXearly XX centuries', New Hermitage-one Moskva 2001, illustrated p. 174, catalogue no 122.