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The Australian Emperor (*Anax papuensis*) is a large species of dragonfly in the family Aeshnidae distributed across Australia, New Zealand, and parts of Oceania. Adults are recognized by their bright green thorax, brownish markings, and powerful flight capabilities. They are highly aggressive hunte...
Myrtillocactus geometrizans, commonly known as the Blue Candle Cactus, is a large, fast-growing, branching columnar cactus native to central Mexico. It is characterized by its striking blue-gray, waxy stems that form a candelabra-like silhouette as the plant matures. The cactus produces small, edibl...
Browningia candelaris is a massive, tree-like species of cactus native to the high-altitude regions of the Andes mountains in Peru, Chile, and Bolivia. It is highly distinguished by its striking candelabra-like appearance, featuring a tall, cylindrical trunk that branches out near the top. A definin...
Parodia magnifica, formerly classified under the name Notocactus magnificus, is a species of cactus commonly known as the balloon cactus. It is native to the southern regions of Brazil and Uruguay, where it typically grows on rocky outcrops. The plant features a distinctive globular shape with a blu...
Melocactus azureus is a globular cactus native to Bahia, Brazil. Its distinctive blue-green coloration and prominent, wooly pink cephalium – a specialized flowering structure – make it an attractive ornamental plant. It’s particularly suitable for collectors of cacti and succulents interested in uni...
Parodia magnifica is a species of flowering cactus native to the southern regions of Brazil, specifically found in Rio Grande do Sul. This globular cactus is distinguished by its blue-green, deeply ribbed body covered in dense, golden-yellow spines, and it produces large, bright yellow flowers durin...
Grandidierite is a borosilicate gemstone notable for its intense blue-green color and unique pleochroism – displaying different hues depending on the viewing angle. Primarily found in Madagascar, this rare mineral is highly valued by collectors and gem enthusiasts. It’s often used in fine jewelry wh...
Native to southern South America, the hedge cactus is a massive, multi-stemmed species often used as natural fencing and known for its large white nocturnal flowers.
Sapphires mined across Montana, USA, valued for a wide color range including blue, green, and parti-colors, with alluvial deposits along the Missouri River.
Parodia magnifica, commonly known as the Balloon Cactus, is a globular succulent native to southern Brazil, where it grows on cliff faces and rocky outcrops. It is characterized by a ribbed, blue-green body covered in fine golden spines and produces large yellow flowers at the crown. The species was...
The Blue Myrtle Cactus is a large, shrubby columnar cactus native to central Mexico. Described in 1897, the plant is characterized by its distinct, waxy blue-green stems that branch out in a candelabra-like formation. It produces small white flowers and dark blue, edible berries. Due to its rapid an...
Pilosocereus royenii is a species of columnar cactus native to the Caribbean and parts of Central America. The plant is distinguished by its tall, tree-like structure and distinctive blue-green or glaucous stems, which are ribbed and feature spiny areoles. It develops a pseudocephalium, a dense, woo...
The Blue Barrel Cactus, scientifically known as Ferocactus glaucescens, is a spherical cactus native to the limestone hills of eastern central Mexico. It is recognized by its distinct pale-blue or grayish-green epidermis and contrasting bright yellow, funnel-shaped flowers. The plant typically grows...
NGC 3242, commonly known as the Ghost of Jupiter, is a planetary nebula located in the constellation Hydra, approximately 1,400 light-years from Earth. It was discovered by William Herschel on February 7, 1785. The nebula exhibits a roughly circular structure with a central white dwarf star and is c...
NGC 6572, sometimes called the Emerald Eye Nebula, is a compact planetary nebula in the constellation Ophiuchus, approximately 3,900 light-years from Earth. It formed when an aging star expelled its outer layers, leaving a hot central remnant whose ultraviolet radiation energizes the surrounding gas...
NGC 6572 is a compact planetary nebula in the constellation Ophiuchus, formed from gas expelled by an evolved star. Its small apparent size and high surface brightness make it accessible to amateur telescopes, while strong emission from ionized oxygen can give it a blue-green appearance. The informa...
The long tailed skipper, Urbanus proteus, is a butterfly in the skipper family Hesperiidae. It occurs from South America through Central America and the southern United States, with migrants sometimes reaching farther north. Adults have blue green bodies and hindwings with conspicuous elongated tail...
The Canada Darner, Aeshna canadensis, is a large dragonfly in the darner family Aeshnidae found across southern Canada and the northern United States. Its dark body bears blue, green, or yellowish markings, with coloration and pattern varying by sex and age. Adults are often observed in late summer...
NGC 6210, commonly called the Turtle Nebula, is a compact planetary nebula in the constellation Hercules. It consists of gas expelled by a dying star, whose hot remnant ionizes the surrounding material and makes it glow, with prominent blue-green emission from oxygen. Friedrich Georg Wilhelm von Str...
NGC 6572, the Emerald Eye Nebula, is a compact and highly luminous planetary nebula in Ophiuchus, notable for its intense blue-green hue and discovered in 1858.
A planetary nebula in Sagittarius roughly 6,000 light-years away, notable for its bright inner shell surrounded by a fainter outer envelope clearly revealed in deep Hubble Space Telescope images.
A blue to green common opal mined in the Andes Mountains of Peru, valued for its attractive pastel hues and widely used in jewelry and decorative carvings.
The Western Pondhawk (*Erythemis collocata*) is a dragonfly native to western North America, first described by Hermann August Hagen in 1861 and commonly found patrolling ponds and marshes.
Fluorapatite is a highly abundant phosphate mineral first described in 1860, notable for forming the basis of tooth enamel and occurring in massive deposits.
Apatite is a group of phosphate minerals frequently found in igneous and metamorphic rocks, serving as a primary source of phosphorus and noted for its hexagonal crystals.
Smithsonite is a zinc carbonate mineral historically known as calamine, named in 1832 in honor of James Smithson, the British founder of the Smithsonian Institution.
