1.53 Ct. Spinel from Tanzania

This 1.53 carat oval blue spinel from Tanzania is an exceptional example of natural color and cutting precision, offered by The Natural Gemstone Company. The stone measures 7.36 by 5.98 by 4.70 millimeters, and is fashioned in an elegant mixed brilliant cut that pairs a faceted crown with a more faceted pavilion to optimize both color and fire. With a medium intense blue saturation and an excellent polish, the gem exhibits lively scintillation and a pleasing face up appearance that makes it immediately attractive to a collector or fine jewellery maker. The mixed brilliant design was selected to balance the stone’s natural color and clarity, creating a broad table that allows a deep blue to read across the face while the pavilion facets return light vibrantly, resulting in a balance of brilliance and color that will make this piece a strong centerpiece in any collection.

Regarding clarity and overall quality, this spinel is graded as very slightly included when evaluated at eye level, which means that the inclusions are minimal and do not materially detract from the visual performance when viewed without magnification. For discerning buyers, this grade represents an excellent tradeoff between natural character and visual purity, since many top quality spinels present either complete eye clarity or very small inclusions that are only noticeable under magnification. Spinel is an isotropic gem with a typical refractive index around 1.718, a dispersion of approximately 0.018, a specific gravity near 3.60, and a hardness of about 8 on the Mohs scale. These physical properties explain the stone’s stable color saturation, its lively return of light, and its suitability for most types of fine jewellery including rings, pendants, and earrings. The stone’s depth is slightly more than average at approximately seventy percent relative to its average diameter, a proportion that intensifies color and depth of tone while modestly reducing face up spread, a desirable characteristic when a rich, jewel like blue is preferred.

A key factor enhancing the appeal and value of this spinel is that it has received no enhancement, being completely natural and untreated, a condition that is highly prized in informed circles because it preserves original material properties and long term stability. Sourced from Tanzania, a region with a growing reputation for producing fine quality spinels, this gem carries geographic provenance that reassures collectors about geological origin and market desirability. For a buyer who values transparency in sourcing and gemological integrity, this stone represents a rare combination of medium intense natural blue color, excellent polish, and minimal inclusions. The durable nature of spinel combined with the precision of the mixed brilliant cut makes it especially well suited to become a focal point in bespoke jewellery, where the cutter’s emphasis on symmetry and facet alignment will be visible through wear, and where the stone’s untreated nature will appeal to clients who prefer natural gems. The Natural Gemstone Company stands behind the description and provenance of this piece and can provide additional gemological information, imaging, and mounting advice to ensure the stone reaches its full potential as a centerpiece in your collection or design.