4.21 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 4.21 carat transparent oval blue sapphire from The Natural Sapphire Company combines the classic allure of Ceylon blue with the precision of modern cutting, offering distinct advantages over many stones commonly found on the market. Measuring 11.97 by 8.25 by 5.00 mm, its mixed brilliant cut brings extraordinary sparkle and light return that you will notice immediately when you compare it to standard oval cuts that favor size over scintillation. Its clarity is graded very slightly included at eye level, which means it reads clean to the naked eye while retaining the natural character collectors value. The vivid color intensity and excellent polish deliver a deep, lively blue without the murkiness that can plague darker, less well cut stones, and although this sapphire has been heat treated, that enhancement is a widely accepted, stable treatment that improves color while preserving the gem’s integrity, a preferable outcome compared to more invasive or surface treatments sometimes used elsewhere.

What sets this Ceylon sapphire apart for the conscious collector is the provenance and responsible sourcing behind it. The Natural Sapphire Company has built direct relationships with Sri Lankan cutters and suppliers to ensure traceability from mine to market, and we prioritize pieces that can be documented to their origin, which matters when comparing ethical credentials to anonymous market lots. Buyers today are rightly skeptical of undisclosed treatments and opaque supply chains, and this sapphire responds to that concern by combining a transparent treatment history with origins from Ceylon Sri Lanka, where artisanal mining traditions can be supported through fair buying practices. Choosing a gem like this over an indistinct commercial stone means supporting better labor practices and environmental awareness, while still securing a gem that competes on quality and beauty with higher priced examples from more famous locales.

For a conscious consumer seeking long term value and timeless appeal, this sapphire is a superior choice, it offers the durability and everyday wearability sapphires are known for, and at 4.21 carats it provides a striking presence for a solitaire engagement ring or an elegant custom piece. Its mixed brilliant faceting and excellent polish maximize brilliance and color, its eye level clarity ensures clean appearance, and its documented Ceylon origin combined with The Natural Sapphire Company’s sourcing standards gives you confidence that you are adding an ethically sourced heirloom to your collection. If you value traceability, responsible sourcing, and a sapphire that outperforms typical market stones in color and cut, this gem is designed to meet those expectations.