48

Platinum, Madagascar Sapphire, and Diamond Ring

centering a bezel-set cushion-cut sapphire weighing 4.11 cts. framed by bead-set full-cut diamonds weighing approx. 0.33 tcw. in an engraved platinum mount; 3.61 dwts.; size 6 1/2

Accompanied by AGL report no. 1151662 dated October 30, 2025 stating that the sapphire is of Madagascar origin, with no indications of treatment.

  • Provenance: Private Wellesley, Massachusetts Collection.
  • Notes: Accompanied by GIA report no. 2231510560 dated February 26, 2025 stating that the sapphire is of Madagascar origin, with no indications of treatment.
  • Condition: overall good condition; minimal scratches to platinum commensurate with age and light wear.

    Please note: All property is sold "AS IS" and any statement, whether oral or written, is given as a courtesy and shall not be deemed as a guarantee, warranty, or representation of the authenticity of authorship, physical condition, size, quality, rarity, importance, provenance, exhibitions, literature or historical relevance of the property or otherwise. The absence of a condition report does not imply the item is in perfect condition.

Accepted Forms of Payment:

ACH, Money Order / Cashiers Check, Personal Check, Wire Transfer

Shipping

A list of recommended shippers can be found on our website. Please contact the shipper directly to get quotes and to make arrangements for them to pick up your items at our gallery. The shipper should contact us to make an appointment to pick up the items and purchasers should also call the gallery to authorize release of the items to the shipper.

April 26, 2026 11:00 AM EDT
Boston, MA, US

Grogan & Company

You agree to pay a buyer's premium of 25% and any applicable taxes and shipping.

View full terms and conditions

Bid Increments
From: To: Increments:
$0 $999 $100
$1,000 $1,999 $100
$2,000 $4,999 $250
$5,000 $9,999 $500
$10,000 $19,999 $1,000
$20,000 $49,999 $2,500
$50,000 $99,999 $5,000
$100,000 + $10,000