Mozambique Ruby 4.01 ct - Uhneated, GRS Certrified

This 4.01 carat natural red ruby represents a rare, top-tier example of untreated material exceeding the four-carat threshold. Cut in a cushion shape with a modified brilliant/step faceting style (8.44 × 7.90 × 5.84 mm), the stone displays exceptional balance between color saturation, transparency, and internal light return.

With eye-clean VVS clarity, this ruby occupies an elite investment category. Such a combination of size, clarity, and untreated status is exceptionally scarce. The stone presents a clean visual appearance while preserving the subtle internal structure expected of a natural ruby, observable only under magnification and consistent with its geological origin.

Gemological examination by GRS Gemresearch Swisslab reports “No indication of thermal treatment.” The absence of heat enhancement, verified through advanced analytical methods, is a primary driver of long-term value in the high-end ruby market. Untreated rubies above four carats with this level of clarity are rarely encountered outside of private collections and curated inventories.

The stated Mozambique origin is widely recognized as one of the most important contemporary sources of fine-quality rubies. Over the past decade, Mozambique has produced some of the world’s most significant unheated stones, now firmly established within the global investment and auction landscape.

This ruby has been curated as a core investment asset — defensible under professional scrutiny, supported by full laboratory documentation, and aligned with the highest standards of the international ruby market. While fully suitable for museum-grade or bespoke high jewelry, its primary value lies in its rarity, integrity, and institutional verification.

Investment Rationale

• Natural ruby exceeding 4.00 ct
• Eye-clean VVS clarity
• No indication of thermal treatment
• GRS Gemresearch Swisslab certification
• Recognized Mozambique origin
• Flagship-level scarcity profile

Gemological Disclosure

This ruby contains minute natural internal features consistent with untreated corundum. These characteristics are inherent to its natural formation and confirm its authenticity. They do not affect transparency, brilliance, or structural stability.