2.78 Ct. Sky Blue Topaz from Brazil

This listing describes a transparent sky blue topaz weighing 2.78 carat, presented in an emerald cut with dimensions of 9.08 x 7.01 x 4.45 mm. The stone displays a medium color intensity and a clean, crystalline body that allows light to travel with clarity and sparkle. Clarity grade is very slightly included evaluated at eye level, indicating small, discreet inclusions that do not materially affect face up brilliance. The pavilion and step facets exhibit an excellent polish that accentuates the stone geometry and the even distribution of color across the table. The material has been enhanced by irradiation, a standard and stable treatment for blue topaz, and is sourced from Brazil. This description and provenance are provided by The Natural Gemstone Company.

In tone and hue the sky blue of this topaz reads as a pure, midday blue with moderate depth, occupying a position between the lighter Swiss blue trade tone and the deeper London blue category. Compared with Swiss blue topaz this gem is slightly less electric and more serene, with a softer saturation that reads as classic sky blue rather than neon or aqua. Against London blue topaz the difference is pronounced, London blue showing a heavier, more inky tone and greater depth of saturation, whereas this piece retains a lighter, more transparent appearance. When compared to aquamarines from the Santa Maria region of Brazil this topaz is bluer and less green leaning, Santa Maria examples typically carry a more oceanic depth and cooler green undertone that produces a richer, more mineral blue. Relative to blue sapphires from Kashmir or Sri Lanka the topaz is considerably lighter in tone and lacks the velvety saturation and durability of corundum, offering instead a bright, fresh blue ideal for jewelry where clarity and a lighter palette are desired. Paraiba tourmalines and other neon blue green gems exhibit far greater intensity and a distinct greenish component, qualities not present in this topaz which remains a true sky blue. These comparisons are intended to clarify the gem character and assist in selection based on hue and tone preferences.