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Ruby

📏 4.1 mm

⚖️ 0.36 ct

🌱 Natural ruby

Moyo Gems, Tanzania

Sourced through our partner, Moyo Gems

🤝 Responsibly sourced through Nineteen48's trusted supply chain

SKU TZ-MY-RUB-000156
Original price £324.00 - Original price £324.00
Original price
£324.00
£324.00 - £324.00
Current price £324.00
Only one available

Responsibly sourced rubies from Sri Lanka and Tanzania. Rubies are corundum, and by definition, red, coloured by the presence of chromium.

Nineteen48 works directly with a trusted network of miners and suppliers to ensure all rubies are sourced through a fair and transparent supply chain.

Rubies are a popular gemstone, one of the "Big Three" of precious stones.

Red corundum is ruby, however there is no official classification for this. If you are looking for a red ruby or a pink sapphire, do broaden your search to look for both.

Nineteen48 rubies are responsibly sourced from Sri Lankan mines through a long-established network of local Sri Lankan miners, with whom strong and trusted relationships have been developed over the years.

The majority of the rubies here are from the Rubyfair project and were sourced from a community mine that operated near Mahenge in Tanzania. These stones have not undergone any heat treatment or other enhancements.

The Rubyfair project has now finished therefore the selection of Rubyfair gems on this website are the last remaining stones.

Moyo Gems is a pioneering, miner-to-market, gemstone collaboration in East Africa.

Nineteen48 is one of the commercial partners working with the women artisanal gem miners and their male allies in Tanzania and Kenya to deliver their gemstones to the international market.

We source our Moyo Gems specificially from miners in various communities in the Tanga region in north-east Tanzania, all of whom are members of the Tanzanian Women Miners' Association (TAWOMA).

Gemmological Info

Ruby is by definition, red. When corundum is red, it is called ruby. There is no definitive rule that separates pink and red - it is up to the viewer to decide if the stone is a ruby or a pink sapphire.

Composition: Al₂O₃ (aluminium oxide)
Crystal system: Trigonal
Hardness: 9
Cleavage: None
Fracture:Uneven, conchoidal
Lustre: Adamantine, vitreous
Specific Gravity (SG): 3.90–4.10
Refractive Index (RI): 1.756–1.780
Birefringence: 0.008–0.010
Optical nature: Uniaxial (-)
Dispersion: .018