Gemstones & Pearls

Coloured Gemstones: What to Record

Rubies, sapphires, emeralds and all other coloured gemstones.

The Data Sheet for Coloured Gemstones

The 24 fields worth recording for coloured gemstones, grouped as in the ordicio app. Fields marked with a broader category come from it; the others are specific to coloured gemstones.

Identification

Species Text Gemstones & pearls: Mineral species as approved by the IMA (main species first), or the material for pearls and organic gems, e.g. Quartz, Corundum, Beryl.
Variety Text Gemstones & pearls: Variety or trade name, e.g. Amethyst, Ruby, Emerald, Rose quartz.
Carat weight (ct) Number Gemstones & pearls: Weight in carats (1 ct = 0.2 g); for several stones the total weight.
Shape / cut Choice Gemstones & pearls: Shape and cutting style.
18 choices
Round brilliant
Oval
Cushion
Emerald / step cut
Princess
Pear
Marquise
Heart
Radiant
Asscher
Baguette
Trillion
Cabochon
Rose cut
Old mine / old European cut
Briolette
Fancy / freeform
Rough / uncut
Colour Text Gemstones & pearls: Colour or colours as seen in daylight, main colour first.
Gem treatment Choice Gemstones & pearls: Enhancement reported by a laboratory or the seller.
None detected
Heating
Oil / resin filling
Fracture / glass filling
Diffusion
Irradiation
Dyeing
Coating
HPHT treatment
Unknown
Geographic origin Text Gemstones & pearls: Country or deposit of origin as reported by a laboratory, e.g. Burma (Myanmar), Colombia, Kashmir.

Measurements

Length (mm) Number Gemstones & pearls: Greatest length.
Width (mm) Number Gemstones & pearls: Width, measured from the front.
Depth (mm) Number Gemstones & pearls: Depth, measured from front to back.

Condition

Condition notes Text Gemstones & pearls: Faults, wear and damage in detail.
Certificate / expertise Text Gemstones & pearls: Certificates of authenticity or expert opinions, with issuer, date and number.

Acquisition

How and when the object came into the collection.

Acquisition date Date Gemstones & pearls: Date the object came into the collection.
Acquisition method Choice, or your own Gemstones & pearls: How the object came into the collection.
Purchase
Auction
Gift
Inheritance
Exchange / trade
Self-collected / found
Commission
Acquired from Text Gemstones & pearls: Seller, auction house (with sale and lot number), donor or place where it was found.
Purchase price Amount Gemstones & pearls: Price paid including fees and premiums.
Provenance Text Gemstones & pearls: Earlier owners and the object's history, oldest first, with sources (labels, invoices, sale catalogues).

Value

Estimated and insured value.

Estimated value Amount Gemstones & pearls: Current market value as estimated.
Valuation date Date Gemstones & pearls: Date of the current value estimate.
Valuation basis Choice Gemstones & pearls: What the estimated value is based on.
Own estimate
Recent sales / auction results
Dealer offer
Catalogue value
Professional appraisal
Insurance valuation
Insured value Amount Gemstones & pearls: Sum the object is insured for.

Collection record

Your own inventory data.

Inventory number Text Gemstones & pearls: Your own number or label for the object, e.g. C-0042, as written on its label or album page.
Storage location Text Gemstones & pearls: Where the object is kept, e.g. room, cabinet, drawer, album and page, box.

Grading

Clarity Text: Clarity of coloured stones in words, e.g. eye-clean, slightly included, silk visible.