1.75 Ct. Greenish Blue Zircon from Cambodia

This beautiful transparent 1.75 carat oval shape greenish blue zircon measures 7.89 x 6.16 x 3.10 millimeters, and it presents a balanced and elegant silhouette suitable for a range of fine jewelry settings. Cut in a mixed brilliant style, the gem combines the scintillating facets of a brilliant cut with the depth and color window control of a mixed pavilion design, delivering lively sparkle and intact depth of tone. The color is best described as greenish blue with an intense color intensity, a hue that offers both cool elegance and a degree of rarity among natural zircons. Clarity has been evaluated at eye level as very slightly included, which means this stone offers exceptional transparency and cleanliness to the unaided eye, while retaining natural character that confirms its authenticity. The polish is excellent, ensuring crisp facet junctions and a smooth surface that maximizes light return, and the enhancement listed is heat treated, a stable and widely accepted process used to optimize the most attractive blue tones. The origin of this zircon is Cambodia, and at The Natural Gemstone Company we present it as a premium, responsibly sourced example of fine gem quality zircon.

To understand why this zircon has its particular color and structure, it helps to travel back in time and imagine the geological forces at work millions of years ago. Zircon forms as tiny crystals in silica rich magmas, and in the crucible of deep crustal processes these microscopic seeds grow as the magma cools. Trace elements such as hafnium, uranium, and minor amounts of transition metals are incorporated into the zircon crystal lattice as it forms, and these impurities interact with the crystal framework to influence color. Over geologic time, the original igneous host rock can be buried, metamorphosed, cracked, and reheated, allowing zircon to record a complex history of heat and pressure. Some crystals remain in their original rock, while others are liberated by erosion and concentrated in alluvial sediments where gem miners later recover them. This particular greenish blue tone likely reflects a combination of trace element chemistry and natural radiation history, later refined by a controlled heat treatment to produce the vivid blue green that you observe. The journey from molten rock to a polished gem is measured in millions of years, and each stage contributes to the stone's eventual beauty and rarity.

From a gemological perspective, several attributes make this zircon especially attractive to an informed buyer. The mixed brilliant cut was chosen to balance optimization of weight and light performance, preserving a generous table and depth that enhances the stone s color while creating lively scintillation under direct light. Very slightly included clarity at eye level indicates that no significant inclusions compromise the gem s integrity or light transmission, yet the natural inclusions that do exist are consistent with a natural, untreated geological origin prior to the accepted heat enhancement. Heat treatment in zircon is a conventional, permanent enhancement that can transform brownish or colorless material into intense blues and greens by altering color centers and the oxidation state of trace components within the crystal lattice. The excellent polish ensures that facet surfaces are smooth and reflective, a necessary factor when evaluating how effectively a stone will perform once set in jewelry. Zircon also has a high dispersion and notable brilliance, qualities that create flashes of spectral color and a lively presence on the hand. For a purchaser versed in gemstone science, this stone represents a combination of strong color, transparent clarity, and cut quality, all rooted in a clear documented origin from Cambodia.

When considering use and long term value, this 1.75 carat oval greenish blue zircon is versatile and well suited to a range of jewelry applications, from a striking solitaire ring to a refined pendant or pair of earrings. The dimensions 7.89 x 6.16 x 3.10 millimeters allow jewelers to design classic or contemporary settings with confidence in the stone s visual balance and wearable scale. Because zircon is denser than many other gem materials, the perceived size can be impressive for its carat weight, and the intense color will maintain presence even in softer lighting. Care is straightforward, with gentle cleaning recommended to preserve the excellent polish and to avoid thermal shock from sudden temperature changes. As with any valuable gemstone, insured setting and periodic professional inspection are recommended. At The Natural Gemstone Company we provide full disclosure of treatments and origin information, and we stand behind the authenticity and quality of every gem we offer. For the educated buyer seeking a gemstone with transparent provenance, exceptional aesthetic qualities, and the geological story that adds depth to ownership, this Cambodian greenish blue zircon is a compelling choice.