Certified Natural 90.15ct Aquamarine Crystal with Muscovite – Ice-Blue Pakistan Pegmatite Specimen

GLverify.com Certificate No: 901259056465

Certified Value: US $135.00

Specimen Type: Natural Aquamarine Crystal with Muscovite & Minor Feldspar
Weight: 90.15 Carats
Origin: Pakistan (Likely Skardu–Shigar Pegmatite Belt, Gilgit-Baltistan)
Primary Mineral: Aquamarine (Blue Beryl)
Associated Minerals: Muscovite Mica, Feldspar (Albite), Trace Iron Oxides
Crystal Habit: Hexagonal prismatic aquamarine with partial termination, mica plate aggregates, and matrix remnants
Quality Notes: Soft ice-blue tone, strong vertical striations, mica books intact, natural surface etching, gem-grade zones visible internally
Recommended Use: Collector display, metaphysical use, educational geological specimen, faceting rough (limited)

1. Primary Mineral: Aquamarine (Blue Beryl – Be₃Al₂Si₆O₁₈)
The dominant mineral in This Specimen is aquamarine, evident from:
Pale ice-blue coloration typical of Pakistani aquamarine
Hexagonal crystal geometry visible on flat faces
Strong vertical striations along the length of the prism
Translucent to semi-transparent clarity with internal veils and fracture patterns
Conchoidal and uneven break surfaces from natural extraction

The aquamarine appears to be a single prismatic section, with minor edge wear and natural etching typical of unheated pegmatitic beryl.

Gemological Notes
Portions of the crystal show:
internally clean zones suitable for small faceting pieces,
slightly frosted terminations,
internal reflective planes producing minor rainbows under direct light.

2. Associated Minerals Identified
A. Muscovite Mica
These Pictures clearly show multiple silver-white muscovite blades attached to the aquamarine surface.

Identifying features:
pearly luster
platy or book-like structure
flexible but not elastic sheets
slightly curved or bent mica laminae
These muscovite groups typically form in the same pegmatitic cavities as aquamarine.

B. Feldspar (Likely Albite)
The white, chalky crystalline material appearing around the muscovite is consistent with albite feldspar, a frequent matrix mineral in aquamarine pockets.

C. Iron Oxide Inclusions
Brown surface specks and vein-like patches likely represent iron oxide staining, a natural result of weathering within the pegmatite.

3. Structural Description
Crystal Habit & Growth
This Specimen displays:
a partially preserved hexagonal prism,
moderate natural surface etching,
mica clusters attached along contact zones,
evidence of mechanical extraction, producing irregular break surfaces.

The aquamarine’s main prism face exhibits classic parallel growth lines and natural translucency transitions from frosted to semi-transparent.

Break & Matrix Contact Areas
Several areas show:
remnants of feldspar matrix,
muscovite interference growth,
internal micro-fracture planes typical of beryl from high-pressure pegmatites.

4. Geological Context (Pakistan Pegmatite Origin)
This Specimen originates from the Himalayan granitic pegmatite fields of northern Pakistan, particularly known for producing some of the world’s finest aquamarine.

These pegmatites form under:
slow-cooling granitic intrusions,
high pressure conditions ideal for large beryl crystallization,
fluid-rich environments that allow mica and feldspar intergrowths.

Aquamarine from this region is internationally known for its clarity, pale blue saturation, and textbook crystal