Datasets:

mp-cmd
/

erebaur-auction-records

license: cc-by-4.0
pretty_name: Erebaur Gem Auction Records
language:
  - en
size_categories:
  - n<1K
task_categories:
  - tabular-regression
tags:
  - gemstones
  - diamonds
  - auctions
  - prices
  - finance
configs:
  - config_name: default
    data_files:
      - split: train
        path: auction-records.csv

Erebaur Gem Auction Records

19 record auction sales of diamonds, rubies and a natural pearl, 2010 to 2023, from the records table in Chapter 14 of the Erebaur encyclopedia: price as announced and in US dollars, carat weight, computed price per carat, house, city and date. Prices include the buyer’s premium.

19 rows, one CSV file: auction-records.csv (UTF-8, comma-separated, header row).

Attribution

Required wherever the data is reused:

Data: Erebaur (https://erebaur.com), CC BY 4.0

The link goes to the matching page on the site, https://erebaur.com/records/. Keep it when you reproduce the line.

Data dictionary

Column	Type	Description
`name`	string	Name of the stone or jewel, as sold or as later known.
`stone`	string	Description: color grade, cut, clarity, origin or setting, as catalogued.
`category`	string	pink-diamond, blue-diamond, colorless-diamond, ruby, pearl or other, read from the description. The same categories as the erebaur.com records page.
`carats`	numeric	Weight in carats at the time of sale.
`price_usd_millions`	numeric	Price in millions of US dollars as the chapter’s table gives it, including the buyer’s premium.
`price_usd`	integer	Best available US$ total: the house’s exact US$ figure where it published one, otherwise price_usd_millions × 1,000,000.
`price_usd_basis`	string	exact_usd_total when price_usd is an exact figure published in US dollars; usd_millions_rounded when it comes from the rounded table figure.
`local_price`	string	Price as the house announced it, in the currency of the sale.
`local_currency`	string	ISO 4217 code of local_price: USD, CHF or HKD.
`local_amount`	integer	local_price as a number. Rounded when the announced figure is (for example "CHF 45.44 million").
`house`	string	Auction house.
`city`	string	City of the sale.
`sale_date`	string	Year and month of the sale, YYYY-MM.
`usd_per_carat`	integer	price_usd divided by carats, rounded to the dollar. Computed by Erebaur; can differ from a per-carat figure a house or GIA publishes.
`stated_record`	string	The record Chapter 14 says this sale holds, in its own words. Empty for every other row: a row is not called a record for ranking first in this table.
`notes`	string	What Erebaur’s editorial review records about this row. Empty when it records nothing.
`sources`	string	Sources in Chapter 14’s list that name this sale: lot records, press releases and GIA reports, separated by " \| ".
`erebaur_url`	url	The sale’s row on the erebaur.com records page, which lays the records out by category.

Sources and how they were checked

The table was rebuilt in September 2026 from auction house primary records: Christie’s lot pages and sale results, Sotheby’s press releases and catalogues, and GIA Gems & Gemology auction reports. Every price is the figure the selling house published, which includes the buyer’s premium. No row rests on Wikipedia.

usd_per_carat is Erebaur’s arithmetic: price_usd divided by carats. Where the house published an exact US$ total, that total is used. Otherwise the table’s US$ figure is used, which is rounded to US$0.1 million, and price_usd_basis says which of the two applies.

The full source list for the chapter, as published on the site: https://erebaur.com/chapters/auctions/#sources

Known limitations

A selection of notable record sales, not every sale above a threshold. Spirit of the Rose is left out because no lot record could be retrieved, and the Marie Antoinette pearl pendant, the natural pearl record, because no carat weight could be.
Auction results only. Most gems change hands in confidential dealer transactions, so a stone sold privately for more does not appear.
Prices include the buyer’s premium; pre-sale estimates do not, so a price and an estimate are not on the same basis.
US$ figures for sales announced in Swiss francs or Hong Kong dollars come from the house or from GIA at the exchange rate on the day of sale, so US$ prices from different years are not directly comparable.
Ranking first in a category here is not a record claim. stated_record carries the claims Chapter 14 makes; The Rock, for example, tops the colorless rows but the chapter makes no record claim for it.
Chapters 13 and 15 mention further prices in their text, but neither holds a structured auction price table, so nothing from them is included.

License

CC BY 4.0. The license covers Erebaur’s compilation: the selection and arrangement of the rows, the column structure and the descriptive text Erebaur wrote. The underlying facts are not owned by anyone, and the publications listed above keep their own rights. See ../LICENSE.

Citation

Data: Erebaur (https://erebaur.com), CC BY 4.0. Erebaur Gem Auction Records, compiled from the Erebaur encyclopedia, last reviewed 2026-09-19. https://erebaur.com/records/

A machine-readable citation is in CITATION.cff.

Regenerating

These files are generated from the encyclopedia content. Do not edit them by hand: run npm run datasets in the site repository.