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Find great specimens of minerals, crystals, rocks and tumbled stones for your collection on bidorbuy.
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Why we love and collect gems
by on December 9, 2014
Precious stones may be rare, but many semi-precious stones are equally beautiful.
Gemstone spotlight: Pearls
by on November 5, 2014
Moh Hardness Scale: 2.5 to 4.5 Specific Gravity: 2.6 – 2.85 Refractive Index: 1.52 – 1.69 Colour: White, pink, yellow, silver, black, blue, green Pearls are some of the oldest of all gemstones, perhaps the oldest. Valued since ancient times, specimens dating from the 6th century BC have been discovered. Traditionally seen as a […]
The Four C’s of Diamonds
by on March 20, 2013
The market value and aesthetic quality of a diamond is defined by the four C’s: Colour, Carats, Clarity and Cut.
The gems hobby-business ran with love
by on February 25, 2011
Seller: sungems Name: Heleen Rossouw Heleen describes her bidorbuy selling venture as a “semi-full-time-hobby-supplementary-income business”. Her main income derives from a family-run company in the services industry, the Cape Town based Enviro-Safe Pest Management and Pathogen Control. Heleen occasionally relies on the Enviro-Safe employees to help with the bidorbuy administration and the dispatch of items […]