Listing Guide for Verified Sellers

All Verified Sellers must adhere to the Listing Guide when submitting items for sale on Gem Rock Auctions. We encourage you to read our Listing An Item - What You Need To Know help article to fully understand what information must be included in your listing.
Many of the rules below have come about due to the subjectiveness of certain terms in the Gemstone industry. These rules are in place to ensure our customers receive a consistent and accurate product.

Which category do I list under?

• Stone Category - where single faceted stones should be listed

• Gemstone Carvings - Only single carvings

• Cabochons - Only single cabochons

• Pairs - All Pairs, including pairs of carvings, cabochons & faceted stones

• Parcels - All Parcels, including parcels of carvings, cabochons & faceted stones

• Rough & Raw - All Rough, including single pieces of rough, pairs of rough & parcels of rough

• Specimens - All Specimens, including single specimens, pairs and parcels of specimens

*If sub categories do not exist and the system allows, listing in the header category is acceptable. Example: Mineral Specimens. You can also raise a support ticket so we can create a category for you.

Item Weight and Dimensions

• Gemstones should be measured to the accuracy of 2 decimal points.

General Rules

• If an item has a hole drilled in it this item is to be listed under Beads / Stone Type

• Alexandrite - Stone must show distinct color change from Green to Red or show a color change that would be considered Alexandrite.

• Aquamarine - If the color of the Aquamarine is highly saturated, then the description should state that "Aquamarine may be irradiated / heated with no evidence present. The color may not be stable". Never state that this stones with high saturation of color as "No Treatment"

• Chocolate Diamond - This is a trademarked term and is NOT to be used on our website

• Csarite - This is a trademarked name and is NOT to be used on our website

• Goshenite - This is the colorless variety of Beryl. This is not to be called “White Aquamarine”

• Hiddenite - Only Green Spodumene that contains the element Chromium may be called Hiddenite. Irradiated green Spodumene from Afghanistan, Pakistan does not contain Chromium and should be referred to as Green Spodumene. It is not to be called Green Kunzite

• Pearls - The term "Natural Pearl" is reserved only for very rare, old pearls that were harvested from the wild. Most pearls these days (both fresh and saltwater) are cultivated and cannot be called "Natural". Please call these "Cultured Pearl", "Real Pearl" or simply "Pearl". The description should clearly state if the Pearl is Freshwater or Saltwater.

• Padparadscha Sapphire - This term is reserved for Sapphire only. Do not use it on any other gemstone type

• Prasiolite - All Green Quartz must be listed as Prasiolite (Green Amethyst is not acceptable). This material is almost always heated or irradiated and heated

• Sapphire - Beryllium Treatment is NOT to be referred to as ‘New Heat’

• Tanzanite - This gemstone is routinely heat treated to improve the color. Listings should state treatment = heated unless you are able to prove otherwise with a certificate

• Topaz - Brown/Orange Topaz is to be sold as Irradiated always

• Topaz (Blue) - Should be listed as treatment = irradiated

• Topaz (Imperial) - Stone must be certified by an approved lab which includes “Imperial” as the color.

• Tourmaline (Paraiba) - This term is reserved for Tourmaline only. Stones must be accompanied by a certificate from an approved lab that also states that copper is the element giving the stone its Paraiba color

• Triphane - This is the Yellow Variety of Spodumene. It is not to be called Yellow Kunzite

• Yellow Beryl / Golden Beryl - This is known as Heliodor. This is not to be called “Yellow Emerald”

• Zircon - This gemstone is routinely heat treated to improve the color. Blue Zircon listings should state treatment = heated unless you are able to prove otherwise with a certificate

• Zultanite - This is a trademarked name and is NOT to be used on our website

Special Mention For Color Change Stones

If the stone being listed is color change, then the seller must make an attempt to show the color change either in a video or in a photo.

Special Mention For Glass Filled and Fissure Filled Stones

As of March 15 2021, Glass filled gemstones of any kind will not be accepted on Gem Rock Auctions

Special mention For Jewelry items

The weight field can be used for either the total weight of the item OR the weight of the stones in the Jewelry item. BUT it must clearly stated in the description what the weight is (ie, "the weights shown is for the entire piece", "the weight shown is for the stones in the piece")

Certified Gemstones

Certificates will only be accepted for the a gemstone lab that is on our approved list of gemstone labs. You can find that list here.

Terms that need the Sheriff's approval

• Museum Grade / Quality

• Investment Grade / Quality

• Collectors Grade / Quality

If there are any questions about the listing guide specifics above, please do not hesitant to raise a support ticket.