Blog Archives

Collecting rocks, crystals and minerals

collecting crystals

Find great specimens of minerals, crystals, rocks and tumbled stones for your collection on bidorbuy.

Why we love and collect gems

Semi-precious stones

Precious stones may be rare, but many semi-precious stones are equally beautiful.

Gemstone spotlight: Pearls


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

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

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 […]