Danburite Gemstone, 3.24 Carat, Trilliant Cut | Collector’s Vault

Danburite — Collector’s Vault

Species: Danburite (calcium boron silicate)
Weight: 3.24 carats
Measurements: 10.61 × 10.95 × 5.77 mm
Cut: Trilliant
Color: Colorless to very pale
Clarity: Included (visible internal features typical for larger faceted danburite)
Treatment: None

Condition and Optics

This trilliant-cut danburite emphasizes size and geometry over precision brilliance. The broad triangular outline creates strong face-up presence, while internal fractures, veils, and reflective planes are clearly visible due to the stone’s size and cutting style. Light performance is uneven, with localized flashes rather than consistent return, which is characteristic of included danburite in non-brilliant cuts. The stone reads as transparent but structurally expressive rather than optically refined.

Geological Context

Danburite is a calcium boron silicate mineral that forms in contact-metamorphic environments, typically associated with boron-rich fluids interacting with limestone or marble. While danburite occurs in multiple localities worldwide, crystals suitable for faceting are less common, and large transparent sections are frequently compromised by internal stress features. Faceted material is usually produced opportunistically rather than through sustained gem-grade mining.

Rarity

Danburite is not a rare mineral species, but faceted stones of this size are uncommon, particularly when untreated and fully transparent. Most danburite crystals either remain as mineral specimens or are cut into smaller stones to avoid structural weaknesses. As size increases, the likelihood of fractures and internal veils rises significantly, which limits the number of stones that can be cut at weights above three carats.

As a result, larger faceted danburite occupies a narrower collector and specialty market rather than mainstream jewelry trade. Stones in this size range with complete outlines and intact girdles are not routinely replaceable and tend to circulate through independent dealers and private collections rather than mass-market gemstone channels.

Wear Considerations

Danburite has a hardness of approximately Mohs 7–7.5 but exhibits brittleness and cleavage-related risk. Trilliant cuts concentrate stress at the points, making this stone unsuitable for daily-wear rings. If set, it requires full protection at the corners and is better suited to pendants or occasional-wear designs. This stone is offered primarily as a collector or study piece rather than a practical jewelry stone.

Price

$185 USD

Danburite does not have a standardized retail pricing structure at larger sizes. Pricing for this stone reflects its substantial carat weight, untreated condition, and complete trilliant outline, while accounting for visible internal features that limit jewelry use. It is positioned for a collector or specialty buyer rather than as a mass-market faceted gemstone.