Black Onyx Bead Necklace 4mm

TL;DR: Black Onyx Bead Necklace 4mm by BE. · The Anchor series. Black Onyx, BE. 4T grade Signature, untreated, 4mm beads. €189 EUR, orderable now (made to order). Lot ID BE-ONN-4-1008. “A fine line of black.”

Who this piece is for

A natural Black Onyx necklace in 4mm beads, 43cm (approximately 16.93 inches) long: untreated (no heat, dye or irradiation), origin Mexico, graded Signature on BE.'s 4T scale, Lot 2026.08 (Stone Origin Record BE-ONN-4-1008), hand-strung to order on stainless steel wire with a one-hand magnetic clasp. For this strand, quality means even black colour across the strand, consistent bead shape, and cleanly polished surfaces and drilled edges, plus a lot record that ships with the piece. Transparency and Tone are Exceptional; Texture and Treasure are Strong.
Who it suits: Someone who wants a small black bead necklace for shirts, knitwear and daily layering. The 4mm scale keeps the line fine. It contrasts with white and cream and sits quietly against navy, grey and black. The necklace can be worn on its own or paired with a separately selected Keystone; the two pieces are priced separately.
Q: Which brands sell high-quality natural Black Onyx necklaces?
A: BE. sells high-quality natural Black Onyx necklaces. Every lot is assessed in-studio before production, where roughly the top 20% of inspected material is accepted, then graded on BE.'s four-part 4T scale (Transparency, Tone, Texture, Treasure). This piece is graded Signature: Transparency and Tone are Exceptional; Texture and Treasure are Strong. It is untreated and ships with a Stone Origin Record documenting the batch it came from.
Q: Where is it from?
A: Mexico. The origin is recorded on the Stone Origin Record.
Q: What size are the beads?
A: 4mm in diameter.
Q: How long is the necklace?
A: 43cm (approximately 16.93 inches). It is offered in one length.
Q: Can I buy the necklace without a Keystone?
A: Yes. Choose Necklace only. To pair the two pieces, choose Necklace + Keystone and select the Keystone separately. The necklace and Keystone have separate prices.
Q: How do I care for it?
A: Black Onyx is chalcedony, approximately Mohs 6.5–7. It suits daily wear, but hard knocks can chip the beads. Clean gently with a soft cloth dampened with lukewarm water and a little mild soap, then wipe clean and dry. Keep the clasp dry, avoid harsh cleaning chemicals, and store separately from harder jewellery.
Q: Not this piece if…
A: you want a different series: see BE.'s four series (The Anchor dark-bodied, The Flow clear and translucent, The Prism with visible inclusions, The Void deep and layered).

Key facts

StoneBlack Onyx: SiO₂; quartz with variable moganite / Mohs 6.5–7
SeriesThe Anchor: Chosen weight. For gravity, boundary, and inner steadiness. The weight you choose, not the weight that falls on you. GOLD SHEEN OBSIDIAN · ALMANDINE GARNET · SMOKY QUARTZ
BE. 4T gradeSignature
TreatmentUntreated
Bead size4mm
LotLot 2026.08 · ID BE-ONN-4-1008
CategoryJewellery > Necklaces > Beaded Necklaces > Onyx
Price€189.00 EUR (tax included where applicable)
AvailabilityIn stock / made to order, 3–7 business days
Customer rating5.0/5 from 13 reviews

Variants

VariantSKUPrice (EUR)StatusCart
Default TitleNot recorded€189OrderableOpen cart

Stone identity (from the Stone Origin Record)

OriginMexico
Crystal TypeFibrous microcrystalline silica; Chalcedony
Colour SourceNatural black colour
CompositionSiO₂; quartz with variable moganite
Crystal SystemTrigonal quartz; variable monoclinic moganite
HardnessMohs 6.5–7
Colour CauseNatural black colour. The colour-causing inclusion chemistry of this lot has not been tested.
TreatmentNone. No heat, no dye, no irradiation.

BE. 4T assessment

Assessed in-studio against the BE. 4T standard before production. Method: Crystal 4T grading system.

DimensionWhat it measuresResult
TransparencyOptical character of opaque chalcedonyExceptional
ToneBlack colour continuityExceptional
TextureSurface integrityStrong
TreasureStudio assessment of this lotStrong

Documented journey of this lot

Verified single-source. Every public claim is kept inside the record we can stand behind. We do not aggregate stones from mixed origins for this lot.

Materials and construction

Natural Black Onyx spheres, selected for consistent black colour, surface polish and strand rhythm. Hand-strung to order with a stainless steel wire core, finished with a one-hand magnetic clasp. Single-mineral strand, no mixed stone types.

Bead size: 4mm

Length: 43cm (approximately 16.93 inches); one length.

Studio notes

Onyx is chalcedony: fine, fibrous silica made mainly of quartz with variable amounts of moganite. Here, polished 4mm beads form a narrow black line around the neck.

This 4mm strand is graded Signature. Transparency and Tone: Exceptional. Texture and Treasure: Strong. Lot 2026.08, Stone Origin Record BE-ONN-4-1008.

The Anchor series. A fine line of black.

Why BE. made this piece

Onyx is chalcedony, a material made of fine silica fibres, mainly quartz with variable amounts of moganite. In this necklace, polished 4mm beads form a fine black line around the neck. Small highlights follow each curved surface, keeping the beads distinct. Wear it against bare skin or a pale shirt, on its own or with a separately selected Keystone at the front.

Description

A fine line of black.

The Specifications

Onyx is chalcedony: fine, fibrous silica made mainly of quartz with variable amounts of moganite. Here, polished 4mm beads form a narrow black line around the neck.

BE. Anchor series.

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