Gemologists compendium

J.H. Steward, London
Set of different instruments in glass fronted wooden cabinet (lacquered black, 30.2 x 22.6 x 13.2 cm). The items include: microscope (lacquered and black lacquered brass, height 27 cm) signed on the base "J.H. STEWARD. LONDON." with two specimen holders; bull's eye condenser lens (lacquered brass); tweezers; refractometer (lacquered and black lacquered brass, 7.8 x 4.2 cm), signed "J.H. STEWARD | LONDON" and numbered "267"; dichroscope (lacquered and black lacquered brass, tube length 6.4 cm, diameter 1.1 cm), signed "J.H. STEWARD | LONDON"; separate compartment with mahogany box with glass bottles containing heavy liquids (methylene iodide etc.); stone tester (three hardness points and gauge, nickel plated brass), with instruction leaflet (12.8 x 7.3 cm).
First half 20th century.

private collection




microscope and bull's eye condenser lens


refractometer and dichroscope


set with heavy liquids




instruction leaflet for "Handy Stone Gauge & Tester"


"Handy Stone Gauge & Tester"