1.63 Ct. Alexandrite from Ceylon (Sri Lanka)

This listing describes a transparent oval alexandrite weighing 1.63 carat, originating from Ceylon Sri Lanka, presented in a classic faceted form with a mixed brilliant cut, dimensions recorded as 1.00 x 1.00 x 1.00 millimeter, clarity graded as slightly included when evaluated at eye level, medium color intensity, and an excellent polish. The stone exhibits a distinct greenish to brownish color change, appearing green under fluorescent lighting and brown under incandescent lighting, consistent with the alexandrite effect typical of chrysoberyl group material from Sri Lanka. No enhancements have been applied, and the finish and pavilion symmetry reflect careful cutting to balance brilliance and color change. The Natural Gemstone Company documents the origin and the lack of treatment, and the photographs illustrate the behavior of the material under different lighting conditions and show scale when placed on a finger for reference.

The 1.63 carat weight is a primary contributor to both the intrinsic and market value of this alexandrite, and it is important to frame that value in terms of scarcity and performance. Alexandrite is a comparatively rare species, and stones that exceed one carat while maintaining a clear color change command a premium because they are less commonly encountered in the global trade. Carat weight measures mass rather than linear dimensions, and therefore weight remains the decisive factor for pricing and rarity when gemologists and experienced buyers assess stones. At 1.63 carat, this alexandrite occupies a category where small increases in weight often produce disproportionate increases in price, because larger examples with acceptable color, clarity, and cut are comparatively scarce. For collectors and designers alike the weight makes the stone versatile enough to serve as a central element in a ring or pendant, while remaining attractive to investors who prioritize verified larger sizes in natural, untreated material.

The cutting style and clarity play a pivotal role in how the 1.63 carat weight translates into visual performance and market desirability. The mixed brilliant cut is designed to maximize internal reflection and to present the color change evenly across the table, and the excellent polish enhances light return and surface luster, which are essential for demonstrating alexandrite character. Slightly included at eye level indicates there are minor internal features visible to the unaided eye under close inspection, yet these do not significantly interrupt the color change or sparkle for most orientations and settings. Medium color intensity in both green and brown states allows for a balanced appearance that is neither too weak to show the phenomenon nor too dark to hinder brilliance. Because the stone is untreated, the observed color and clarity are natural expressions of its Ceylon origin, and provenance provided by The Natural Gemstone Company supports transparency about source and condition.

From a practical standpoint the 1.63 carat weight informs setting choices, conservation considerations, and long term value retention. A stone of this weight and optical behavior benefits from a setting that protects the girdle and minimizes abrasion, while allowing sufficient light entry to showcase the color change, such as a secure bezel or a well proportioned prong setting with a deep seat. The density and mass represented by 1.63 carat give the piece a presence on the finger or in a pendant that is noticeable without being oversized, and this balance often appeals to clients who seek wearable rarity. For valuation and documentation purposes The Natural Gemstone Company can provide detailed information regarding origin, treatment status, cutting specifications, and images under multiple lighting conditions, and we recommend independent gemological certification for buyers who require formal grading. Routine care for this type of alexandrite includes limiting exposure to harsh chemicals and extreme heat, and periodic professional cleaning to maintain luster and polish.