Certified 84.75ct Natural Aquamarine with Black Tourmaline & Feldspar Matrix – Pakistan Pegmatite Crystal

GLverify.com Certificate No: 901225646545

Certified Value: US $135.00

Specimen Type: Natural Aquamarine Crystal with Schorl Tourmaline & Feldspar
Weight: 84.75 Carats
Origin: Northern Pakistan (likely Shigar Valley or Haramosh Pegmatite Belt)
Primary Mineral: Aquamarine (Blue Beryl – Be₃Al₂Si₆O₁₈)
Associated Minerals:
Black Schorl Tourmaline (clearly visible)
White Feldspar / Albite (matrix on upper portions)
Condition: Partially etched aquamarine with matrix attachment and a prominent embedded tourmaline crystal
Best Uses: Collecting, Display, Educational/Geological Study

1. Mineral Identification
Primary Mineral – Aquamarine (Beryl Variety)
This Specimen contains a medium-light icy blue aquamarine crystal showing:
Pale blue coloration typical of Pakistani pegmatite aquamarine
Translucent clarity with internal veils and growth channels
Hexagonal structure still partially visible despite surface etching
Matte natural texture on some faces due to dissolution and pocket corrosion

Secondary Mineral – Schorl Tourmaline (Black Tourmaline)

A prominent jet-black mineral inclusion is visible near the top of the aquamarine.
It displays:
Characteristic black color with submetallic luster
Striated texture typical of schorl tourmaline
Rounded but still recognizable crystal form

Its presence is mineralogically significant—tourmaline association increases desirability for collectors.

Additional Minerals – Feldspar (Likely Albite)
The white mineral topping the aquamarine is consistent with feldspar matrix:
Soft white to off-white coloration
Porous and layered structure
Common pegmatite host material

These features confirm the specimen’s natural, unaltered pegmatite origin.

2. Structural Description
Crystal Habit of Aquamarine
The aquamarine shows a prismatic beryl crystal habit, though partly weathered.
Natural breakage and etching create a rough, organic look.
Striations along the length of the crystal remain visible.
Portions of the specimen exhibit “pocket corrosion,” where hydrothermal fluids etched the crystal walls.

Surface Features
Areas of smooth aquamarine faces remain, indicating the original crystal geometry.
Feldspar matrix is firmly attached and naturally intergrown.
Schorl is embedded in the matrix rather than glued or artificially placed—a strong sign of authenticity.

Color & Transparency
A pleasing light-blue tone, shifting slightly based on lighting.
Semi-translucent overall, with cloudy internal zones.

Overall Morphology
A naturally shaped aquamarine fragment with matrix components intact.
Good aesthetic contrast: blue aquamarine + white feldspar + black tourmaline.

3. Geological Context
This Specimen fits the classic composition of Pakistan’s high-altitude pegmatite fields, especially the:

Shigar Valley
Skardu
Haramosh Range

These regions are globally recognized for producing:
Aquamarine
Schorl Tourmaline
Albite
Muscovite
Topaz
Quartz

Aquamarine forms when beryllium-rich pegmatitic fluids crystallize in cavities, often alongside feldspar and tourmaline. The presence of schorl indicates iron-rich pegmatite environments, which is typical for northern Pakistan’s metamorphic and granitic zones.

The intergrowth of aquamarine, feldspar, and schorl is textbook pegmatite mineralization—highly desirable in natural mineral specimens.

Condition & Authenticity Assessment
100% natural aquamarine
Unheated and untreated
No dyeing, coating, or stabilization
Retains original growth surfaces and internal crystal features

Suitable for:
Mineral specimen collections
Display pieces
Educational or certification purposes