10.02 Ct.Tw.Total Carat Weight Ruby Pair from Mozambique

This matched pair of rubies is presented by The Natural Ruby Company, accompanied by a C.Dunaigre certificate that verifies origin and treatment, and affirms the stones as Intense Red in color intensity. The pair weighs 5.02 carats and 5.00 carats respectively, and each gem is fashioned into a classic oval shape. The measured dimensions are 12.23 by 8.75 by 4.72 millimeters for the larger stone, and 12.32 by 8.71 by 4.67 millimeters for the companion. Both stones are cut as mixed brilliant ovals, exhibiting an excellent polish, and have been evaluated as very slightly included at eye level. The stones are natural corundum from Mozambique, and they have undergone routine heat treatment to enhance color and clarity, a stable and widely accepted enhancement that improves visual performance without compromising structural integrity.

From a lapidary perspective these rubies demonstrate refined proportions and facet engineering that maximize color saturation and light return while maintaining a voluptuous oval outline suitable for matched jewelry settings. Each stone employs a mixed brilliant strategy, combining a faceted crown with a pavilion geometry calibrated to control light leakage and reduce windowing. The measured depth produces depth percentages of approximately 45.0 percent for the 12.23 by 8.75 by 4.72 millimeter specimen, and 44.4 percent for the 12.32 by 8.71 by 4.67 millimeter specimen. These depths fall into a balanced range for oval mixed cuts, providing a strong tradeoff between face up spread and internal color concentration. The crown faceting includes kite and triangular facets arranged to produce broad face up flash and scintillation, while the pavilion facets have been angled to produce return paths that reinforce the red saturation rather than dispersing it into lighter tones. The excellent polish and careful facet junctions yield symmetry and window free appearance under normal viewing, and the matched proportions ensure uniformity of hue and intensity when these stones are set as a pair.

Durability considerations make this pair exceptionally well suited to daily wear in jewelry, including rings, pendants, and earrings. Corundum, the mineral species of ruby, has a Mohs hardness of 9, making it second only to diamond among common gem materials in resistance to surface abrasion. Corundum lacks true perfect cleavage, and displays robust toughness for wearable pieces, with conchoidal to uneven fracture behavior that does not predispose the gems to splitting under normal impact. The heat treatment applied to these rubies is a stable enhancement that improves internal clarity and color without introducing fragile fillings or coatings, and under ordinary conditions the treatment will not leach or alter. Routine jewelry care such as periodic cleaning with warm soapy water or an ultrasonic bath is appropriate, but avoidance of extreme thermal shock and strong acids is recommended. For settings The Natural Ruby Company recommends secure four or six prong or bezel mounting to protect the girdle, and routine inspections to ensure prong integrity. This pair combines certified provenance, precise lapidary execution, and the inherent physical resilience of corundum, making them ideal candidates for daily worn, heirloom quality ruby jewelry.