Brown Calcite Formation

Description

Brown calcite formation from India. 8" x 7.5" x 6". 6 lbs, 13 oz.

Buyer's Premium

15%

Dimensions

8 x 7.5 x 6 in

Weight

6.13 lb

Brown Calcite Formation

Lot 0036

Estimate $200-$300Sep 19, 2026, 1:00 PM EDT

Starting Price

Secure

$80

Good Bid

Strong Bid

Competitive Bid

Or select a higher max bid amount

Get approved to bid.

Fall Rock and Fossil Timed Clearance Auction

Sep 19, 2026, 1:00 PM EDT

Houston, TX, United States

Copper Ore in Matrix: Copper ore in matrix from the Winonia Mine in Houghton County, Michigan. 5" x 5.5" x 1". 1 pound, 13 ounces.

Sep 19, 2026Copper Ore in Matrix

$175

Green Calcite Torch Formation: Green calcite torch formation from Mexico. 8" x 4.5" x 3.25". 4 lbs, 2 oz.

Sep 19, 2026Green Calcite Torch Formation

$1

Remarkable Calcite Stalactite: Remarkable, freestanding calcite stalactite from China. 18.5" x 2.5" x 5.5". 4 lbs, 9 oz.

Sep 19, 2026Remarkable Calcite Stalactite

$250

Seed Fern Leaf Fossil: Seed fern leaf fossil. 11” x 6.5” x .5”. 2 lbs.

Sep 19, 2026Seed Fern Leaf Fossil

$1

Huge Amethyst Cathedral Geode Pair: Huge amethyst cathedral geode pair with fluorescent calcite deposits. 30"H, 15"W, 8"D and 30"H, 15"W, 8.5"D, respectively. 193.45 lbs total weight.

Sep 19, 2026Huge Amethyst Cathedral Geode Pair

$900

Huge Septarian Dragon Egg Heart Geode: Huge septarian dragon egg heart geode. 9" x 9.5" x 6". 21 lbs, 6 oz.

Sep 19, 2026Huge Septarian Dragon Egg Heart Geode

$125

Cubic Pyrite, Chalcopyrite and Fluorescent Calcite Specimen: Cubic pyrite, chalcopyrite and highly fluorescent calcite formation from the Huanzala Mine in Ancash, Peru. 8" x 9" x 5". 11 lbs, 12 oz.

Sep 19, 2026Cubic Pyrite, Chalcopyrite and Fluorescent Calcite Specimen

$400

Polished End-Chambered Ammonite Fossil: Polished end-chambered ammonite fossil from Madagascar. 3.5" x 4.25" x 1.75". 1.04 pounds.

Sep 19, 2026Polished End-Chambered Ammonite Fossil

$60

Large Polished Labradorite Freeform: Large polished labradorite freeform from Madagascar. 8" x 9.75” x 3.25". 17 lb, 14 ounces.

Sep 19, 2026Large Polished Labradorite Freeform

$450

Calcite and Barite Formation: Large, unique and colorful calcite and barite formation. A sparkling array of grays, whites, browns and blues. 11.5" x 10" x 6". 7 lbs, 9 oz.

Sep 19, 2026Calcite and Barite Formation

$400

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

Sep 19, 2026Golden Cubic Calcite Formation

$350

Green River Sycamore Leaf Fossil: Sycamore leaf fossil from the Green River in Wyoming. Other impressions as well. 7” x 7” x 1”. 2 lbs, 9 oz.

Sep 19, 2026Green River Sycamore Leaf Fossil

$90

Atomic Amethyst Crystal Point: Super rare atomic amethyst crystal point from Santander, Colombia. Quartz over amethyst with internal starburst pattern. 6” x 2.5” x 2”. .86 pounds

Sep 19, 2026Atomic Amethyst Crystal Point

$50

8 Optical Calcite Iceland Spar Rhomboid Formations: 8 optical calcite/iceland spar rhomboid formations. 1 pound, 9 ounces total.

Sep 19, 20268 Optical Calcite Iceland Spar Rhomboid Formations

$1

Oklahoma Ammonite Fossil: Ammonite fossil from Lake Texoma, Oklahoma. 4.5" x 4" x 2.75". 2.04 pounds.

Sep 19, 2026Oklahoma Ammonite Fossil

$1

Live Edge Spectrolite Freeform: Large, live edge, front-polished spectrolite freeform from Madagascar. 8.75" x 12” x 4". 14 lb, 15 ounces.

Sep 19, 2026Live Edge Spectrolite Freeform

$600

Large Amethyst Cathedral Geode: Large amethyst geode with fluorescent calcite crystals from Brazil. 19.5” x 13” x 10”. 45.5 lbs.

Sep 19, 2026Large Amethyst Cathedral Geode

$400

Polished Bullseye Malachite Formation: Polished bullseye malachite formation from the DR Congo. 5.5" x 7.5" x 1.5". 4 lb, 2 ounces.

Sep 19, 2026Polished Bullseye Malachite Formation

$175

Rose Quartz Sphere: Large rose quartz sphere from Brazil. 5.25" x 5.25" x 5.25". 6 lbs, 15 oz.

Sep 19, 2026Rose Quartz Sphere

$70

127 Pound Rare Blue Smoke Quartz Cluster - MONUMENT: Massive, beautiful and rare Blue Smoke Quartz cluster from La Belleza, Santander, Colombia. 21.5” x 25” x 7”. 127 lbs.

Sep 19, 2026127 Pound Rare Blue Smoke Quartz Cluster - MONUMENT

$3,500

Related Items

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

Sep 19, 2026Golden Cubic Calcite Formation

$350

Calcite and Barite Formation: Large, unique and colorful calcite and barite formation. A sparkling array of grays, whites, browns and blues. 11.5" x 10" x 6". 7 lbs, 9 oz.

Sep 19, 2026Calcite and Barite Formation

$400

TOP