1.70 Ct. Blue Star Sapphire from Madagascar

This extraordinary blue star sapphire presents itself as a rare and refined jewel, a stone that will command attention in any bespoke collection. We are offering one translucent 1.70 carat oval shape blue star sapphire, with exact dimensions of 7.02 x 5.17 x 4.24 mm, fashioned in a classic cabochon cut that showcases a clear and precise six ray asterism. Evaluated at eye level the clarity is slightly included, which is a natural and characterful aspect that helps to produce the vivid color intensity you see, and the polish is excellent so the surface reads clean and luminous. This sapphire is a natural, no enhancement gem from Madagascar, an origin that is renowned for producing star sapphires with deep, velvety blue tones and strong light responsive stars. Owning a stone of this calibre means possessing something rare, a single example of nature and craftsmanship preserved for a collector who understands subtlety and provenance.

When considering how to set this cabochon star sapphire the approach should protect the dome while allowing the star to take center stage. A low bezel that follows the oval silhouette will cradle the stone securely while leaving the top surface unobstructed, a choice that enhances everyday wear with a clean, architectural profile. For clients who prefer a more open feel and maximum light interaction, a four or six prong setting that grips at the girdle will display the star with greater brilliance under direct or diffuse lighting. The vivid blue and stellar effect favor a design that is both minimal and noble, so think of a high polished platinum or 18 carat white gold mounting to provide contrast and cool saturation, or a warm 18 carat yellow gold frame when you want to introduce a vintage or heirloom character. The cabochon dome is substantial at 4.24 mm and benefits from a slightly elevated head so the asterism appears crisp across a range of lighting conditions, preserving that celestial shimmer that makes this gem exceptional.

For a truly individualized composition the oval blue star sapphire will pair magnificently with a selection of complementary gemstones to create an exclusive ensemble. Surrounding the star sapphire with a halo of small white diamonds will intensify the perceived color and add scintillating contrast that frames the star like a constellation. If you prefer color resonance, consider pairing it with cornflower blue sapphires for a monochromatic study, or with rich royal blue sapphires for graduated depth. For collectors seeking striking contrast, a cluster that incorporates fiery orange Fire Opal accents will produce a dramatic and modern interplay between cool celestial blue and warm volcanic fire, a combination that reads as both avant garde and deeply symbolic. Tiny round brilliant diamonds or trapeze cut baguettes can bridge the transition between the central cabochon and angular side stones, while a few black spinels or deep red rubies placed asymmetrically will speak to a contemporary collector who enjoys curated tension. Metals will influence perception, so let platinum or white gold amplify the pristine asterism, and let yellow or rose gold sing with the Fire Opal for an opulent, couture statement.

At The Natural Sapphire Company we specialize in transforming single gems like this Madagascar blue star sapphire into one of a kind treasures, crafted to the precise taste of each client. Commissioning a bespoke setting allows us to tailor proportions, choose accent stones, and refine metal finishes so that the finished piece reads as an heirloom carried forward with intention. The rarity of a vivid, well polished, untreated star sapphire in this size means that options are limited, and acquiring this gem places you among a select few who own a living example of mineral magic. If you would like, we can provide design sketches and sample metal and gemstone pairings, and advise on practical details for daily wear so your bespoke piece maintains the integrity of the star and the beauty of the cabochon. For collectors who appreciate provenance, aesthetic restraint, and a tactile link to the earth, this star sapphire is a sovereign choice, and The Natural Sapphire Company stands ready to realize its highest expression.