Unpolished Opal Formation

Description

Unpolished opal formation from Brazil. 7" x 5" x 3.5". 4 lbs, 14 oz.

Buyer's Premium

15%

Dimensions

7 x 5 x 3.5 in

Weight

4.14 lb

Unpolished Opal Formation

Lot 0362

Estimate $150-$200Jul 25, 2026, 1:00 PM EDT

Starting Price

Secure

$40

Good Bid

Strong Bid

Competitive Bid

Or select a higher max bid amount

1 bidder is watching this item

Get approved to bid.

LiveAuctioneers Purchase Protection

Vetted auction houses

Secure, online bidding

Returns guaranteed for misrepresented listings

Dedicated support when you need it

Summer Rock and Fossil Clearance Auction

Jul 25, 2026, 1:00 PM EDT

Houston, TX, United States

Large Polished Labradorite Freeform: Large polished labradorite freeform from Madagascar. 10" x 7.5” x 4". 21 pounds, 8 ounces.

6 days LeftLarge Polished Labradorite Freeform

$500

Polished Hematoid Quartz Heart: Polished hematoid quartz heart from Madagascar. 5.5" x 6" x 1.75". 3 lbs, 9 oz.

6 days LeftPolished Hematoid Quartz Heart

$70

Huge Polished Ammonite Fossil: Huge polished ammonite fossil from Madagascar. 9.5" x 11.25" x 2.25". 9 pounds, 11 ounces.

6 days LeftHuge Polished Ammonite Fossil

$350

Polished Fluorite Sphere: Polished fluorite sphere from China. 3.25” x 3.25" x 3.25". 2 lbs, 2 oz.

6 days LeftPolished Fluorite Sphere

$20

Moroccan Jurassic Four Starfish Fossil - Cracked: Moroccan Jurassic four starfish fossil with cracks on front. Needs repair or to be split into multiple fossils. 7" x 9" x 1". 4 pounds, 1 ounce.

6 days LeftMoroccan Jurassic Four Starfish Fossil - Cracked

$90

Colorful Goethite Formation: Multi-colored goethite stalactite specimen from Chihuahua, Mexico. 4" x 11.5" x 3". 2 lbs, 7 oz.

6 days LeftColorful Goethite Formation

$175

Moroccan Jurassic Four Starfish Fossil: Moroccan Jurassic four starfish fossil. 5.5" x 7.25" x .5". 1 pound, 7 ounces.

6 days LeftMoroccan Jurassic Four Starfish Fossil

$150

Small Ludlamite and Vivianite Specimen: Small Ludlamite and vivianite specimen from Brazil. 2.5” x 2.75” x 1”. 5 oz.

6 days LeftSmall Ludlamite and Vivianite Specimen

$20

Paciphacops Trilobite Fossil: Paciphacops trilobite fossil from the Clarita, Oklahoma area. Siluro-Devonian Age. 3.75" x 2.25" x 2.25". 15 ounces.

6 days LeftPaciphacops Trilobite Fossil

$125

Polished Rhodonite Heart: Polished rhodonite heart from Madagascar. 5.5" x 6.5" x 2". 4 lbs, 14 oz.

6 days LeftPolished Rhodonite Heart

$100

Polished Bullseye Malachite Specimen With Cut Base: Large polished bullseye malachite specimen from the DR Congo. Underside was cemented and painted. 5.5" x 8.5" x 3.75". 8 lbs, 7 oz.

6 days LeftPolished Bullseye Malachite Specimen With Cut Base

$125

7 Optical Calcite Rhomboid Formations: 7 optical calcite rhomboid formations. 1 pound, 7 ounces total.

6 days Left7 Optical Calcite Rhomboid Formations

$10

Quartz and Cubic Pyrite Formation: Stunning and large quartz and cubic pyrite formation from the Huanzala Mine in Peru. 6" x 8" x 6". 12 lbs, 5 oz.

6 days LeftQuartz and Cubic Pyrite Formation

$550

Copper Ore in Matrix: Copper ore in matrix from the Lake Superior Copper District in Michigan. 7" x 7.25" x 1.25". 3 pounds, 4 ounces.

6 days LeftCopper Ore in Matrix

$175

Cubic Pyrite and Quartz Plate: Cubic pyrite and quartz in rarely found plate form from Peru. 5” x 8.5” x 3”. 3 lbs, 7 ounce.

6 days LeftCubic Pyrite and Quartz Plate

$175

Three Green River Fish Fossil Plates: Three fish fossil plates from the Green River in Wyoming. 1 pound, 5 ounces total.

6 days LeftThree Green River Fish Fossil Plates

$20

Golden Cubic Calcite Formation: Golden yellow cubic calcite formation from Hunan Province, China. 8” x 10” x 3”. 9 lbs, 4 oz.

6 days LeftGolden Cubic Calcite Formation

$350

Moroccan Jurassic Six Starfish Fossil: Moroccan Jurassic six starfish fossil. 9.5" x 13" x 1". 5 pounds, 3 ounces.

6 days LeftMoroccan Jurassic Six Starfish Fossil

$300

Unpolished Bullseye And Fibrous Malachite Formation: Unpolished bullseye and fibrous malachite formation from the DR Congo. 10" x 6" x 2.5". 4 pounds,5 ounces.

6 days LeftUnpolished Bullseye And Fibrous Malachite Formation

$450

Velvety Malachite Formation: Velvety malachite formation from the DR Congo. 7" x 5" x 2.75". 2 pounds, 10 ounces.

6 days LeftVelvety Malachite Formation

$225

Related Items

Unpolished Bullseye And Fibrous Malachite Formation: Unpolished bullseye and fibrous malachite formation from the DR Congo. 10" x 6" x 2.5". 4 pounds,5 ounces.

6 days LeftUnpolished Bullseye And Fibrous Malachite Formation

$450

Massive Unpolished Malachite Stalactite Formation - MONUMENT: Massive 85 pound malachite stalactite formation from the DR Congo. 25" x 16" x 6". 85 pounds, 6 ounces.

6 days LeftMassive Unpolished Malachite Stalactite Formation - MONUMENT

$3,000

Unpolished Malachite and Chrysocolla Formation: Unpolished malachite and chrysocolla formation from the DR Congo. 10.25" x 13.25" x 2.5". 16 lbs, 11 oz.

6 days LeftUnpolished Malachite and Chrysocolla Formation

$250

Ultra-Rare Vivianite Cornucopia Crystal Formation: Ultra-rare, translucent green vivianite crystal cluster formation in the shape of a cornucopia. Super high quality. 2.5" x 8" x 4.25". 2 pounds, 7 ounces.

6 days LeftUltra-Rare Vivianite Cornucopia Crystal Formation

$450

Huge, Rare Chrysocolla and Quartz Formation: Huge, rare chrysocolla and quartz formation from the Tentadora Mine in Peru. 8.75" x 10.5" x 6". 21 pounds, 10 ounces.

6 days LeftHuge, Rare Chrysocolla and Quartz Formation

$1,300

Magnificent Stibnite Formation: Magnificent stibnite formation from China. 11” x 5.75" x 4.75". 5 lbs, 3 oz. NOTE: THIS LOT IS DELICATE AND CANNOT BE SHIPPED. IT MUST BE PICKED UP IN PERSON.

6 days LeftMagnificent Stibnite Formation

$900

Ultra-Rare Vivianite Cannoli Crystal Formation: Ultra-rare, translucent green vivianite crystal cluster formation in the shape of a cannoli. Super high quality. 3.5" x 6" x 3". 2 pounds, 9 ounces.

6 days LeftUltra-Rare Vivianite Cannoli Crystal Formation

$550

Epidote Formation With Enormous Crystals: Beautiful and rare epidote formation with enormous crystals from Peru. 5.5” x 8.5” x 4.5”. 8 lbs, 14 oz.

6 days LeftEpidote Formation With Enormous Crystals

$700

Himalayan Aragonite Stalactite Formation: Large Himalayan aragonite stalactite formation on custom wood stand. This specimen was $3800 at a gem store. 17.5” x 13.5” x 4.5”. 34 lbs, 13 oz.

6 days LeftHimalayan Aragonite Stalactite Formation

$700

Large Rare Octahedral Pyrite Formation: Large, rare octahedral pyrite formation from Peru. 7” x 7” x 6”. 23 lbs, 2 oz.

6 days LeftLarge Rare Octahedral Pyrite Formation

$900

Blue Coral Formation on Lucite Stand: Blue coral formation from the Philippines on lucite stand. 7.5" x 8" x 4". 2 pounds, 7 ounces.

6 days LeftBlue Coral Formation on Lucite Stand

$150

Colorful Goethite Formation: Multi-colored goethite stalactite specimen from Chihuahua, Mexico. 6" x 10.5" x 3.75". 3 lbs, 9 oz.

6 days LeftColorful Goethite Formation

$250

TOP