IGI Asscher HPHT CVD Loose Diamond​

Product Overview

This Asscher Cut lab-grown diamond combines the strengths of HPHT (High Pressure High Temperature) and CVD dual technologies, catering to discerning buyers drawn to vintage elegance—particularly as Art Deco-style jewelry searches have surged by 28% year-over-year . Backed by IGI certification, it balances CVD’s ability to produce large, pure crystals with HPHT’s capacity to create vivid, natural-looking color—resulting in a stone that mirrors the timeless appeal of mined Asscher cut diamonds from the 1920s. It is ideal for Art Deco-inspired engagement rings, statement pendants, or cocktail rings, appealing to collectors and style-forward buyers alike.

Material & Design

Dual-Technology Core: Utilizes a selective hybrid growth process: first, HPHT creates a high-quality diamond seed with D-E native color (a grade achieved by 68% of HPHT-grown stones, known for their crisp, icy tone ), then CVD expands the crystal while maintaining Type IIa purity (with a yield rate of >85% for flawless specimens). This hybrid approach eliminates color inconsistencies common in single-technology stones.

Cut Heritage: Features the iconic Asscher square step cut—patented in 1902 by the Asscher Brothers of Amsterdam—with cropped corners and deep, wide facets that create a "hall-of-mirrors" effect. Each cut adheres to original Asscher specifications (a depth ratio of 60-65% and table width of 55-60%), enhancing clarity visibility and emphasizing the stone’s geometric symmetry—a hallmark of the Art Deco aesthetic.

Product Characteristics

Quality Benchmarks: IGI-verified clarity targeting VS to VVS grades, with "None" inclusion notes under 10x magnification—critical for Asscher cuts, as their large table facets make inclusions more visible than in round or cushion cuts. The optimized depth ratio (60-65%) ensures maximum light performance, avoiding the "windowing" effect (dark centers) that plagues poorly cut Asscher stones.

Technical Integrity: Undergoes rigorous testing for authenticity: X-ray analysis verifies no magnetic response (with magnetization levels <5×10⁻⁵ SI, well below the industry threshold of 1×10⁻⁴ SI for non-magnetic diamonds ), while cathode luminescence imaging maps the stone’s growth structure—distinguishing it from mined diamonds and confirming its lab-grown origin without ambiguity.

Versatility: Available in carat weights ranging from 1.5ct to 4ct to suit diverse jewelry styles, and compatible with both solitaire settings (to highlight its geometric beauty) and halo settings (to amplify brilliance with smaller accent stones). It pairs exceptionally well with white gold or platinum—metals that complement its D-E color and Art Deco heritage.

Service

Authentication: Includes an IGI diamond report with a dedicated section on the stone’s dual-growth method, plus a scannable QR code linking to IGI’s online database for instant verification. This transparency addresses buyer concerns about "undisclosed treatments" and ensures the stone’s value is recognized by jewelers worldwide.

Custom Services: Offers both modification of existing Art Deco designs (e.g., adjusting prong styles or adding filigree details) and full custom creation. Our design team provides CAD renderings within 1-2 business days and physical wax models upon request—allowing buyers to test fit and appearance before finalizing orders.

Support: Provides free expert gemologist consultations (via phone or video call) to help buyers select complementary metals and accent stones (e.g., sapphires or emeralds for a classic Art Deco look). We also offer a 30-day "design adjustment" period, during which minor changes to settings can be made at no extra cost.

Below is a detailed breakdown of the Asscher cut lab grown diamonds available, including material, dimensions, and certification details: