Modern Fossils

(10,000 price results)

Sort by:

Most Relevant

6ct Ceylon Pink Sapphire Round Cut No Reserve GGI Certified: characterized by a vibrant pink hue and significant dimensions,this gemstone is prized for it's origin in Ceylon, a region renowned for producing high-quality sapphires with exceptional color and tran

2026

6ct Ceylon Pink Sapphire Round Cut No Reserve GGI Certified

California GemstonesSan Diego, CA

Natural Santa Maria Blue Aquamarine 3.5 Ct Round Cut from Brazil: Santa Maria Blue. round-cut natural Aquamarine represents the pinnacle of rarity, boasting the deep, vivid "Double Blue". saturation that is vanishing from the global market. and eye-clean clarity cre

2026

Natural Santa Maria Blue Aquamarine 3.5 Ct Round Cut from Brazil

California GemstonesSan Diego, CA

Natural Amethyst 3.75ct Marquise Cut from Brazil No reserve IGI Certification: A natural, marquise-cut, purple amethyst from Brazil is typically a high-clarity, vibrant stone featuring excellent transparency. Brazilian amethyst is renowned for its quality, ranging from pale lave

2026

Natural Amethyst 3.75ct Marquise Cut from Brazil No reserve IGI Certification

California GemstonesSan Diego, CA

Tourmaline 8.46ct Round Cut from Brazil No reserve GIE Certified Georgeous Color: an exceptionally rare, high-value gem, typically showcasing intense neon blue or green hues due to copper content. As a large, high-carat stone, it is likely to be highly sought after, with premium ex

2026

Tourmaline 8.46ct Round Cut from Brazil No reserve GIE Certified Georgeous Color

California GemstonesSan Diego, CA

11ct Ceylon Pink Sapphire GIE Certified No Reserve: Large-carat gemstone from Ceylon, characterized by vibrant, almost neoon hues and high transparency. Renowned for exceptional brilliance and clarity, this Ceylon stone is highly prized, durable, and i

2026

11ct Ceylon Pink Sapphire GIE Certified No Reserve

California GemstonesSan Diego, CA

Tanzanite 1.08 tcw Pear Cut 5 gems Individually IGI certified: featuring individual International Gemological Institute (IGI) certification for each stone. Tanzanite is a trichroic mineral (zoisite) mined exclusively in Tanzania, known for its intense violetish-b

2026

Tanzanite 1.08 tcw Pear Cut 5 gems Individually IGI certified

California GemstonesSan Diego, CA

Natural Amethyst 4.08ct Rectangle Mixed Cut from Uraguay No reserve: Uruguayan amethyst is highly prized for its deep, rich purple color, which commands higher prices than lighter alternatives.This 4.08ct natural Uruguayan amethyst features a rectangular mixed cut, sho

2026

Natural Amethyst 4.08ct Rectangle Mixed Cut from Uraguay No reserve

California GemstonesSan Diego, CA

Natural Amethyst 4.03ct Oval Mix Cut from Uraguay No reserve IGI Certification: Uruguayan amethyst is highly prized for its deep, rich purple color, which commands higher prices than lighter alternatives.This 4.08ct natural Uruguayan amethyst features a rectangular mixed cut, sho

2026

Natural Amethyst 4.03ct Oval Mix Cut from Uraguay No reserve IGI Certification

California GemstonesSan Diego, CA

Green Tsavorite 9ct Trillion Cut from Kenya No reserve GGI Certified: high-value garnet exhibiting vivid emerald-green hues, sourced from the Taita/Taveta region. This exceptionally brilliant,, eye-clean, and untreated gemstone features a triangular shape designed to ma

2026

Green Tsavorite 9ct Trillion Cut from Kenya No reserve GGI Certified

California GemstonesSan Diego, CA

Natural Emerald 10 Ct Square Radiant Cut from Colombia: Natural Colombian emerald features a square radiant cut, blending intense green color with high brilliant-cut facets. Sourced from renowned Chivor mines, this gemstone is designed for maximum sparkle

2026

Natural Emerald 10 Ct Square Radiant Cut from Colombia

California GemstonesSan Diego, CA

Natural Green Emerald 1.33ct Mixed Oval Cut from Colombia IGI Certification No Reserve: featuring a deep green hue due to the region's unique geological conditions. It is cut into a mixed oval shape, enhancing its color and brilliance, and features inclusions, often described as "jardin"

2026

Natural Green Emerald 1.33ct Mixed Oval Cut from Colombia IGI Certification No Reserve

California GemstonesSan Diego, CA

6.5ct Myanmar Blood Red Ruby Cushion Cut GIE Certified No Reserve: Originating from the Mogok region, it features a vivid, deep-red hue ("pigeon's blood") with strong fluorescence. Such a large stone is highly valuable, characterized by rich color saturation. Split f

2026

6.5ct Myanmar Blood Red Ruby Cushion Cut GIE Certified No Reserve

California GemstonesSan Diego, CA

6.5ct Myanmar Blood Red Ruby Cushion Cut GIE Certified No Reserve: Originating from the Mogok region, it features a vivid, deep-red hue ("pigeon's blood") with strong fluorescence. Such a large stone is highly valuable, characterized by rich color saturation. Split f

2026

6.5ct Myanmar Blood Red Ruby Cushion Cut GIE Certified No Reserve

California GemstonesSan Diego, CA

Natural Amethyst 3.66ct Oval Mixed Cut from Brazil No reserve IGI Certification: a high-quality, vibrant purple gemstone, ideal for jewelry due to its oval mixed cut, which enhances brilliance. Sourced from Brazil, it likely features superior color saturation and clarity, with a d

2026

Natural Amethyst 3.66ct Oval Mixed Cut from Brazil No reserve IGI Certification

California GemstonesSan Diego, CA

Natural Almondine Garnet 1.58ct Fancy Cut from Sri Lanka IGI Certification No Reserve: Natural Almandine Garnet originating from Sri Lanka, featuring a Fancy Cut. Almandine is a historically significant variety of garnet, prized for its deep, rich red to purplish-red colors.

2026

Natural Almondine Garnet 1.58ct Fancy Cut from Sri Lanka IGI Certification No Reserve

California GemstonesSan Diego, CA

Natural Almondine Garnet 1.58ct Fancy Cut from Sri Lanka IGI Certification No Reserve: Natural Almandine Garnet originating from Sri Lanka, featuring a Fancy Cut. Almandine is a historically significant variety of garnet, prized for its deep, rich red to purplish-red colors.

2026

Natural Almondine Garnet 1.58ct Fancy Cut from Sri Lanka IGI Certification No Reserve

California GemstonesSan Diego, CA

Pink Sapphire 8.55ct Round Cut from Sri Lanka Bright! Clear!! No reserve: a substantial, rare, and highly prized gemstone, typically sourced from the country's alluvial deposits. Ceylon pink sapphires are celebrated for their vibrant, intense colors—ranging from delicate

2026

Pink Sapphire 8.55ct Round Cut from Sri Lanka Bright! Clear!! No reserve

California GemstonesSan Diego, CA

London Blue Topaz 3.6ct Trillion Cut from Brazil No reserve: This 3.6ct trillion-cut London Blue Topaz from Brazil is a premium, deep-blue gemstone enhanced through irradiation, creating a luxurious "steely" or inky blue color. The triangular trillion cut maxim

2026

London Blue Topaz 3.6ct Trillion Cut from Brazil No reserve

California GemstonesSan Diego, CA

Lot of 10 Amethyst 3ct Cushion Cut from Brazil VVS Dazzling Purple No reserve: These stones display a deep, vibrant purple color, high clarity (VVS - Very Very Slightly Included), and are known for excellent transparency. They are ideal for high-end jewelry, offering superior cr

2026

Lot of 10 Amethyst 3ct Cushion Cut from Brazil VVS Dazzling Purple No reserve

California GemstonesSan Diego, CA

Neon Blue Tourmaline 11ct modified Cushion Cut No Reserve GIE Certified: Neon blue tourmaline, particularly if it is a Paraíba tourmaline (copper-bearing), is exceptionally high due to its rarity, with high-quality specimens. This stone, often Paraiba-type or from premium

2026

Neon Blue Tourmaline 11ct modified Cushion Cut No Reserve GIE Certified

California GemstonesSan Diego, CA

SOLD

Shadow Box Display of Rocks, Minerals, and Possible Fossils in Wooden Frame: **Important** Please read below description on how to avoid high shipping costs. Various rocks, minerals, and possible fossils presented in a shadow box with overall dimensions of 25 1/2 inches high,

2026

Shadow Box Display of Rocks, Minerals, and Possible Fossils in Wooden Frame

Lodestar AuctionsGurnee, IL

ROCK & MINERAL COLLECTION: This lot features a curated collection of various rocks and minerals.

2026

ROCK & MINERAL COLLECTION

Salem Auction HouseSalem, OR

Loose Diamond - OVAL 5.1ct E VVS2: Loose Diamond - OVAL 5.1ct E VVS2 Source: This is a real non-mined Diamond that has been grown in a lab Shape: OVAL Carats: 5.1 Color: E Clarity: VVS2 Certification: IGI Video:

2026

Loose Diamond - OVAL 5.1ct E VVS2

Diamond DepotNew York, NY

Loose Diamond - OVAL 1.0ct Fancy Light Yellow VS2: Loose Diamond - OVAL 1.0ct Fancy Light Yellow VS2 Source: This is a real non-mined Diamond that has been grown in a lab Shape: OVAL Carats: 1.0 Color: Fancy Light Yellow Certification: IGI Video:

2026

Loose Diamond - OVAL 1.0ct Fancy Light Yellow VS2

Diamond DepotNew York, NY

View:

24

Fossils Auctions

Beautiful Malachite Dish, 454 grams

Quartz Carved Cockatoos on Pyrite Cluster, 104 grams

Fine Ancient Meteorite Specimen

Summer Jewelry, Fossils and Minerals Auction

Inspired Auctions

Starts on:

Brea, CA, US

Arietites bucklandi.Cenoceras sp.

A SPRING COUNTRYSIDE SCENE

A BLACK 'DIPLOMAT' ARMCHAIR

2026 Ethereal Auctioneers Spring Auction-1

Ethereal Auctioneers

Starts on:

Taipei City, ???, TW

1 day Left

AMETHYST ROCK STONE LAPIDARY SPECIMEN

MIXED STONE TREE ROCK STONE LAPIDARY SPECIMEN

COIN AND PLANK NECKLACE

ROUGH ROCKS & RARITIES Bulk Lots Jewelry

Col. Christie Hatman Auctioneers

Starts on:

Thayer, MO, US

2 days Left

TOP