Erebaur
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22°54′36″ N096°31′12″ E

Erebaur finds precious stones for private clients, jewelers and collectors in any producing country. Every stone is tested by an independent laboratory before the purchase completes.

Start a sourcing brief How it works
(Fig. 01)Service4 kinds of search

You name the stone.
We go and find it.

A sapphire for a ring, a matched pair for earrings, a rare gem for a collection. Erebaur holds no stock: every search starts from your brief and ends with a laboratory report.

  • S-01

    Single stones

    One stone to a written brief: species, size, color, treatment and origin. We search until one matches, then an independent laboratory tests it.

    Brief → lab report → handover

  • S-02

    Pairs & suites

    Earrings, rivières and calibrated layouts need stones that agree in color, size and cut. We assemble the set and document every stone in it.

    Calibrated sizes · color matching

  • S-03

    Rare & collector gems

    Padparadscha, Paraíba tourmaline, red beryl, benitoite. Some of these surface a few times a year. We follow the dealers and cutters who see them first.

    Collector species · documented provenance

  • S-04

    Rough & parcels

    For jewelers and cutters: rough with export papers, melee and calibrated parcels, bought where the goods are sorted.

    Kimberley Process papers for rough diamond

The full service

(Fig. 02)Reach56 localities · 31 countries · 14 hubs

Wherever the
stone is.

Fine stones pass through mines, cutting centers and trading hubs before they reach a shop. We search at all three. Filter the map by stone.

Locality record

Mogok

Country
Myanmar
Stones
Ruby, sapphire, spinel, peridot
Status
artisanal
Position
22°55′12″ N 096°30′00″ E

The classic ruby district; held by TNLA rebels from July 2024 to October 2025

Open the atlas

(Fig. 03)Process5 stages, brief to handover

Brief to handover,
in five stages.

You approve each stage before the next one starts. Nothing is bought until an independent laboratory report supports the brief.

  1. Stage 1 of 5

    Brief

    You tell us what the stone must be and what it must not be: size, color, treatment, origin, budget, deadline. We confirm feasibility in writing.

    You receiveSearch plan and fee letter

  2. Stage 2 of 5

    Search

    We work dealers, cutters, auction previews and markets in producing countries. Candidates come back with photos, video and the seller’s papers.

    You receiveShortlist with photos, video and prices

  3. Stage 3 of 5

    Inspection

    A gemologist examines each shortlisted stone in person, checks weight and measurements, and rejects anything that fails the brief.

    You receiveInspection notes and inclusion images

  4. Stage 4 of 5

    Independent lab

    The chosen stone goes to an independent laboratory suited to the stone and its market. The purchase completes only if the report supports the brief.

    You receiveOriginal laboratory report

  5. Stage 5 of 5

    Handover

    Insured shipping or hand delivery, customs handled, and the full dossier. An independent valuation is added if you ask for one.

    You receiveStone, lab report, sourcing dossier

(Fig. 04)Sourcing dossier8 parts · specimen

The stone arrives
with its papers.

An independent laboratory report, plus our dossier on where the stone has been and who handled it. Hover a part to find it on the specimen.

Erebaur · Sourcing dossierFile ER-00-0000

Laboratory report

Independent laboratory report

Report no. 0000 0000 00

Original enclosed · verify with the issuing laboratory

Identity

Species
Corundum
Variety
Blue sapphire
Weight
3.08 ct
Measurements
8.61 × 7.94 × 5.12 mm
Shape & cut
Cushion, mixed cut

Treatment & origin

“No indications of heating.”

“Origin: Sri Lanka.”

Quoted as the laboratory words it

Chain of custody

  1. Source regionMonth 1
  2. CutterMonth 1
  3. DealerMonth 2
  4. InspectionMonth 2
  5. LaboratoryMonth 3
  6. ClientMonth 3

Trade documents

  • Commercial invoice
  • Export permit
  • Kimberley Process n/a

Screening

  • Seller identity
  • Sanctions lists
  • Declared origin

Imaging

FaceProfileInclusions

Valuation · optional

Independent appraiser, on request

Specimen layout. Values are illustrative and describe no real stone.
  1. 1

    Laboratory report

    The original report from an independent laboratory, with a number you can check on the lab’s own verification service where it offers one.

  2. 2

    Identity of the stone

    Species, variety, weight, measurements, shape and cut, as measured by the laboratory.

  3. 3

    Treatment and origin

    Quoted exactly as the laboratory words them. An origin statement is an expert opinion, not a certainty.

  4. 4

    Chain of custody

    Every documented hand the stone passed through, from source region to you, with dates.

  5. 5

    Trade documents

    Invoices and export permits, plus Kimberley Process certificates wherever rough diamond is involved.

  6. 6

    Screening record

    Checks on sellers and declared origin against the sanctions and anti-money-laundering rules that apply to the purchase.

  7. 7

    Imaging

    Photographs, video and inclusion images taken at inspection, so the stone can be recognized later.

  8. 8

    Valuation, optional

    An insurance valuation from an independent appraiser. We never value the stones we source.

(Fig. 05)Index22 chapters · 182 entries · 48 figures

Read up
before you brief.

Erebaur also publishes a free encyclopedia of precious stones. Start with the chapters that matter most when you buy: grading, laboratories, treatments, synthetics and ethics.

  1. A-01Assessment08Grading & evaluation8 entries · 8 min · 3 fig.
  2. A-02Assessment09Labs & certification4 entries · 4 min · 1 fig.
  3. A-03Assessment10Treatments & enhancements9 entries · 9 min · 1 fig.
  4. A-04Assessment11Synthetics & simulants7 entries · 7 min · 1 fig.
  5. B-01Society17Ethics, ESG & regulation9 entries · 9 min · 2 fig.
  6. B-02Encyclopedia22All chapters, from definitions to ownership182 entries · free to read
  7. B-03ReferenceA–ZEvery entry, stone and place in one alphabetical listIndex

Tell us
the stone.

About four minutes. A gemologist replies by email.

Start a sourcing brief How the service works