Blue Haüyne — Collector’s Vault

Species: Haüyne (feldspathoid group)
Weight: 0.95 carats
Measurements: 7.47 × 5.73 × 3.72 mm
Cut: Faceted, rectangular outline
Color: Saturated deep blue to cobalt blue
Clarity: Included (typical for species)
Treatment: None

Condition and Optics

This stone displays strong intrinsic color for haüyne, with a dense blue body color that remains present across viewing angles. Inclusions and internal features are visible, consistent with natural haüyne and expected at this size and material type. Faceting is utilitarian rather than optimized for brilliance, prioritizing retention of weight and color over light performance. No evidence of coating, dye, or enhancement.

Geological Context

Haüyne is a feldspathoid mineral that forms in silica-poor, alkaline volcanic environments. These geological conditions are uncommon and geographically limited. Crystals form rapidly in volcanic systems, resulting in small, brittle material with a high fracture rate. The blue color is caused by sulfur radicals trapped within the crystal lattice during formation. This color mechanism is intrinsic and cannot be enhanced. Heat treatment destroys haüyne.

Rarity

Facet-grade Blue Haüyne is rare. Most material is opaque, heavily fractured, or too small to cut. Stones approaching one carat are uncommon, and stones retaining strong saturation at this size are scarcer still. Supply is sporadic and locality-dependent, with no commercial-scale mining and no expectation of increased availability. Once sold, comparable stones are not easily replaced.

Wear Considerations

Mohs hardness is approximately 5.5–6. This stone is not suitable for daily wear and should be considered a collector specimen or set only in protective designs. Durability limitations are inherent to the species and are reflected in collector-market positioning.

Price

$1,150 USD (approximately $1,210 per carat)

Pricing reflects the scarcity of near–one-carat facetable haüyne, strong natural color, absence of treatment, and limited, inconsistent market availability. This stone is offered as a collector mineral rather than a wearable substitute for sapphire or spinel.

Haüyne does not have a standardized retail price guide. Pricing is based on collector-market comparables, size-relative scarcity, and the limited availability of facetable material. Stones approaching one carat with strong natural color trade infrequently and are priced accordingly.