Topaz Pendant - Height: 2 cm - Width: 1.7 cm- 4.2 g - (1)

BLUE TOPAZ PENDANT IN RAW FORM – 925 SILVER – BUCKLE “BUCHE” CLASP
1. General description

Pendant with a raw blue topaz set in 925 silver.
The stone preserves its natural shape, uncut, showing internal fractures and organic transparency typical of an authentic geological crystal.
It is not a flawless industrial gem; it is a mineral in an honest state.

2. Measurements and weight

• Total weight: 4.20 g

• Approximate dimensions of the stone: 20 x 17 mm
• Thickness: 0.5 cm
• Notable thickness for its size
• Visible measurements in photos with a ruler
Solid 925 silver setting.

3. Mineralogical identification

Mineral: Topaz
Commercial variety: Blue Topaz
Natural rough crystal with vitreous fracture and characteristic cleavage planes of topaz.

4. Chemical formula

Al₂SiO₄(F,OH)₂
Aluminum silicate with fluorine and hydroxide.

5. Hardness and density

• Hardness: 8 on the Mohs scale
• Theoretical density: 3.4 – 3.6 g/cm³
Physical behavior is consistent with the mineral species.
Exact density cannot be isolated when mounted in silver.

6. Visual and geological reading

Medium transparency with natural inclusions and internal microfractures typical of topaz.
Vitreous luster under direct light.
No rounded bubbles present (rules out glass).
No hexagonal structure present (rules out beryl/aquamarine).

7. History and possible origin

Topaz has been valued since antiquity for its hardness and clarity.
In its pure natural state, topaz is generally colorless and transparent, a fact not widely known by the general public.
Possible origin of the material: Brazil (Minas Gerais), one of the world's leading topaz producers.
Without mining documentation, origin cannot be asserted with absolute certainty.

8. Gemological curiosities

The famous blue color associated with topaz in contemporary jewelry is not the most common color in nature.
Intense blue is typically achieved through controlled irradiation followed by heat treatment, a standard practice internationally accepted in the gem trade.
More than 90% of blue topaz on the world market has been treated.
This is not a forgery, but a color enhancement that is stable and disclosed.
Intense natural blue topazes without treatment are extremely rare and significantly more valuable.
Understanding this difference is part of the gemological criteria that distinguishes an informed purchase.

9. Mounting and artisanal work

Open 925 silver setting that allows the crystal to be admired in its natural state.
1659
925 silver means it contains 92.5% pure silver, an international standard in quality jewelry.

10. “Buche” articulated clasp – Brand distinction

The pendant features a “buche” clasp (trombone-type articulated bail).
Advantages:
• Better drop on the chest
• Less unintended rotation
• Allows thicker chains
• Prevents the back from showing
• More costly and less common in industrial productions
This is a differentiating feature compared to conventional settings.

11. Authenticity and tests performed

• Visual inspection with magnifying glass
• Negative magnetic test
• Coherent crystal structure
• Not glass or resin
Not certified by an external laboratory, but identified by in-house gemological analysis.
Online platforms host imitations; thus physical characteristics are detailed with transparency.

12. Condition

Very good overall condition.
Irregularities inherent to natural rough crystal.
Firm and solid setting.

13. Market context and investment

Blue topaz is a widely appreciated gemstone in international jewelry.
Rough specimens mounted while preserving their natural form are less common than cut stones.
Authentic specimens, especially mounted in 925 silver, are increasingly scarce, reinforcing collector interest and potential value appreciation.
Each crystal arises from geological processes of millions of years and human effort in extraction.

14. Care and maintenance

Avoid hard knocks despite its hardness 8.
Do not expose to harsh chemicals.
Clean with a soft cloth and neutral soap.
Store separately from other pieces.

Conclusion
A natural, educational, and transparent piece in its description.
It does not sell fantasy, but mineralogical discernment.
Choosing an authentic piece is not just a purchase; it is a conscious decision that combines beauty, knowledge, and real value.