Rubrum Ring
Rubrum Ring
Rubrum Ring
Rubrum Ring
Rubrum Ring
Rubrum Ring

Rubrum Ring

This mesmerizing 18 carat rose gold band ring, is centering a Mediterranean Coral Cabochon cushion weighing 9.20ct.. The flexible band is set with 70 Amethysts weighing 5 carats in total. 


Metal: 18k rose gold 


Height: 1,03 in. (24.73 mm)

Width: 0.48 in. (12.22  mm)

Depth: 0.15 in. (4.06 mm)

  • Mediterranean Coral: weight 9.20 carats, cushion cut
  • Amethyst: 70 pieces, weight 5 carats in total

Weight: 13.98 gr.

COD: 1916884R
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This piece has been hand manufactured by trusted and highly qualified craftsmen according to the best Italian goldsmith tradition using the latest technology. Alex Jona hallmark 404TO guarantees the origin of the product and the precious metal content is confirmed by the official gold hallmarks.

18 Karat Rose Gold

18k (75%) gold is the purest form of gold used for jewelry (pure 100% gold is 24 karats by definition). 18k means that 18 out of the 24 parts that make up the gold are pure gold. The most common hallmark stamps for 18 karat gold are  18K or 750 that indicate 75% gold purity. Rose gold is an alloy also known as pink gold and red gold. Although the names are often used interchangeably, the difference between red, rose, and pink gold is the copper content: the higher the copper content, the stronger the red coloration. 18K red gold means 75% gold and 25% copper. 18K rose gold means 75% gold, 22.25% copper and 2.75% silver. 18K pink gold means 75% gold, 20% copper, 5% silver.

Mediterranean Red Coral

Red coral, or precious coral, is a type of coral species mainly found in the Mediterranean Sea. It is typically the only kind of coral used in high jewelry. Coral is a type of marine invertebrate that lives in compact colonies of countless identical single polyps (reefs). Red coral grows in rocky sea-bottoms that have minimal sedimentation. The environments are dark, such as the depth of the sea or a cavern or crevice. They can be found 10 meters to 300 meters below sea level. What’s very interesting is just how old red coral is. Sizable reefs of red coral take over 100,000 years to form. As for which seas, the Mediterranean Sea is the most famous source of red coral. However, red coral also grows in the Pacific Ocean (i.e. Japan and China).


Amethyst is the purple variety of the quartz mineral species. It ranges in color from clear purple to bluish violet. Amethyst is February's birthstone and is said to bring the wearer luck, constancy and protect against magic. Amethyst rates 7 on the Mohs hardness scale making it an excellent gemstone for everyday wear.

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