Order till the 23rd for Christmas! Extended Returns!
(877) 449-0090  •  Contact Us

Rare Antique Demantoid Diamond Ring


The gem demantoid (pronounced dih-MAN-toid) often goes unrecognized. Rare as the stone is no longer mined and those over 1 carat are exceptionally scarce. When all factors are equal, the secret to gemstones and their value is color. Better color, richer and more vivid hues correlate with a more valuable gem. The three (3) demantoids in this turn of the century example are bright grass green – the color most desired in this type of gem. Clear and fine, there is no muddiness at all. Its high refractive index (only diamonds are higher) gives it a great dispersion and high luster and a brilliance that rivals that of diamonds.

A traditional Edwardian five stone ring in 18k yellow gold gives credence to the statement of the brilliance of the gorgeous demantoid garnet in comparison to the diamond. Three (3) faceted demantoids, two (2) old European cut diamonds and eight (8) small rose cut diamonds embellish the period ring. The central demantoid is approximately .50 carats and has that coveted horsetail feather* characteristic which everyone loves. The side demantoids has an estimated weight of .20 carats each which brings the total demantoid weight of the ring to about .90 carats. In all, the ten (10) diamonds have an estimated total diamond weight of .75 carats. The pierced gold gallery has nicely detailed scroll designs.

Date: Circa 1900.

*A horsetail feather is a brown crystal inclusion of radiating needles that emanates outwardly from the center of the demantoid garnet. This inclusion is a prized characteristic which sets apart the Russian demantoid garnet from its brethren.

+ Measurements, Condition & More

Measurements: Gem area is 3/4 inches (1.9 cm) in length by ¼ of an inch (0.6 cm) at the widest. Weight of 5.2 grams (3.3 dwt).

Ring Size: US 7 3/4 (UK P 1/2; Int. Dia. 18; 56.5 mm; Japan under a 16) and easily can be sized to fit most. Ring sizing information.

Hallmarks: “18ct”.

Condition: Excellent; main stone has an inclusion with breaks through to the surface visible with magnification.

Origin: Demantoids are Russian; mount is English.

Note: Stones have not been removed from their mounts to preserve the integrity of the setting. All diamond and gemstone weights have been approximated by measurement and formula and may vary from actual weights.

Forms of Payment

  1. VISA and MasterCard, Discover and American Express credit & debit cards.
  2. Personal checks drawn on U.S. banks only - Please allow 7 business days for clearance.
  3. Money orders, cashier's and traveler's checks - Please allow 7 business days for clearance.
  4. PayPal.

Other Forms of Payment
Bank Wire - For international orders and orders of $5,000 and over. Please contact us for more details.

Layaway information and for full details see Payment Methods.


Same Day Shipping - Order by 1 pm CST M-F!

FREE for All U.S. Orders - Standard 2 Day Shipping.

FREE for All International Orders - Standard 2-7 Day Shipping.

Full details at Shipping & Insurance.

Standard Money Back No Risk Guarantee

If you are not completely satisfied with your purchase, notify us within (3) days of receipt for a full refund. Return shipping is free!


Just write "extended return" in the comments box of your order to qualify! Notify us by December 29th, ship back by January 2nd, 2015.

Standard Return Procedure

  1. Notify us of your intention to return the item within three (3) days of receipt. You may contact us by email or by telephone.
  2. Please ship back to us within another two (2) days after we receive notification from you.
  3. As soon as the item is received, a full refund is issued to you that same day.

More details at Full Guarantee including gift giving and holiday options.

You Might Also Like