Primitive Gemstone Cutting Technique in Ceylon 1903 This evocative photograph from 1903 captures the traditional gemstone cutting technique in Ceylon (now Sri Lanka), offering a rare glimpse into the skilled craftsmanship of the era. Two artisans are seated on the ground, working with a manually operated cutting machine, powered by a hand-cranked spindle. Surrounded by […]
PLUMBAGO or Graphite Preparation PLUMBAGO (from Lat. plumbum, lead), a name frequently applied to graphite, “Miniran” in sinhala Languge. When Chemistry was in its early days and the graphite was thought to be a form of lead. Because of this, it was called “plumbago” (Latin for “acts like lead”). The black core of pencils is […]
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