Mining activities are conducted by erecting makeshift dams. Some mines are licenced, but most operate illegally. In addition to gem, illegal miners also mine for sand to earn extra income.

Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co. Hardness and toughness Gem and mineral hardness is measured on the Mohs scale.

Coloured precious stones miner Gemfields (LON: GEM) (JSE: GML ... Gemfields also said on Friday that production at its Montepuez ruby mine in Mozambique had resumed. Operations were halted ...

and a net debt position of $80.5-million – before auction receivables of $33.9-million – as the company continues to fund the Montepuez ruby mine’s (MRM's) second processing plant.

The balanced funds that have ticked (just about) all the boxes since 2022 ...

Several also connected the style statement to her “Guilty as Sin” lyrics, “What if he’s written ‘mine’ on my upper thigh?” — from her Grammy-nominated album, “The Tortured Poets ...

Namibian demantoid mining is highly mechanized, using heavy equipment to extract the green garnets from their host rock (see figure 1). Monthly production varies between 15 and 20 kg. Of that, a ...

Coloured stones miner Gemfields has paused the sale of emeralds from the Kagem mine in Zambia, hoping that the government will soon reverse export tariffs. "Emerald exports are, since 1 January ...

Perseus Mining Ltd has taken a final investment decision (FID) to develop the CMA underground project at the Yaouré Gold Mine in Côte d’Ivoire. ICMM and the International Network for Acid Prevention ...

Commenting in an operational update on Friday, the London- and Johannesburg-listed firm also said production had resumed at Montepuez, a ruby mine in Mozambique. In December, the mine was partly ...