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Rare Gems

Nature’s precious secrets

“Gemstones are magic. And for the people like myself who spend their entire life looking for them, these legendary tales of mesmerising stones are where love, passion, and adventure are born.”

Iver Rosenkrantz


Each item of jewellery that Rosenkrantz creates is distinct and unique and made even more special by using only responsibly sourced materials that give back to the communities that mined them. It is through this commitment to the ethical sourcing of gemstones that Rosenkrantz is leading the way for a new era of mindful luxury.


Emeralds are the epitome of mystery and glamour, beauty and romance. As a royal gemstone, they have been highly sought after and appreciated by the Aztecs, Europeans, Arabs and Indians, who all tried to find emeralds with the passion of true collectors. The word ‘emerald’ comes from the Latin sma­ragdus, transliterated directly from the ancient Greek ‘σμαραγδος’, meaning ‘green stone’. In Medieval times, Christians thought the Holy Grail was carved from one emerald, and the green colour is of course symbolically charged with life, rebirth, renewal of nature, hope and perfection, optimism and prosperity.


Few gems have held our attention over millennia as well as sapphire. The pure blue colours and excellent durability of this gem-quality member of the corundum family make for an exceptional gemstone. The name sapphire is derived from the Latin "saphirus" and the Greek "sapheiros", both of which mean blue. While sapphires are typically blue, there are natural "fancy" sapphires that occur in yellow, purple, orange, and green colours; "part sapphires" show two or more colours.



Poised between lush blue, vibrant violet, and rich purple, exotic tanzanite is found in only one place on earth, near majestic Mount Kilimanjaro. Tiffany & Co named this blue-violet variety of zoisite in honour of Tanzania, where it was first unearthed in 1967. Tanzanite is particularly known for its “trichroism”, meaning its ability to show different colours based on the viewing direction: from violet blue to bluish violet.


One of the world’s most precious treasures, a diamond is one of nature’s most incredible and unique gifts. Born deep in the earth millions of years ago, diamonds have been on an incredible natural journey. Much like a snowflake, every diamond is unique, with a natural pattern telling a different story, no two alike. Diamond is the only gem made of a single element: carbon. This structure makes it the hardest, naturally occurring substance on earth.


The name “Aquamarine” originates from the Latin meaning "water of the sea" and is the blue to blue-green variety of Beryl. Rosenkrantz sources its Aquamarine exclusively from Zimbaqua, an all-women mine in Zimbabwe. Zimbaqua is the World’s first sustainable mine empowering women in rural communities through mining. Zimbaqua works closely with the community leaders to ensure that it positively impacts their communities with our priority being; the education and well-being of children.


Tsavorite, the world’s rarest garnet; is a stunningly beautiful green gemstone that rivals any other green gem. Though Tsavorite is found in both Tanzania and Kenya, the very finest Tsavorite, with the purest green hues is still only found in Tsavo, Kenya. A relatively new gemstone in terms of market exposure, but it is one of the oldest forming gemstones in the gem kingdom, having formed 2 billion years ago at the foothills of Mt Kilimanjaro, Africa’s highest mountain.

If you would like to enquire about any of Rosenkrantz’s gemstones or need help in sourcing your own, contact us for more information.

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